EP2103818A1 - Surface réduisant le frottement et surface destinée à intensifier l'échange massique et thermique - Google Patents
Surface réduisant le frottement et surface destinée à intensifier l'échange massique et thermique Download PDFInfo
- Publication number
- EP2103818A1 EP2103818A1 EP06847404A EP06847404A EP2103818A1 EP 2103818 A1 EP2103818 A1 EP 2103818A1 EP 06847404 A EP06847404 A EP 06847404A EP 06847404 A EP06847404 A EP 06847404A EP 2103818 A1 EP2103818 A1 EP 2103818A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dimples
- dimple
- flow
- concave
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012546 transfer Methods 0.000 title claims abstract description 34
- 230000002708 enhancing effect Effects 0.000 title description 2
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 230000021615 conjugation Effects 0.000 claims abstract description 19
- 230000009467 reduction Effects 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000011241 protective layer Substances 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 36
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 230000001965 increasing effect Effects 0.000 claims description 9
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003814 drug Substances 0.000 abstract description 2
- 230000003203 everyday effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 37
- 230000008569 process Effects 0.000 description 29
- 238000005755 formation reaction Methods 0.000 description 16
- 239000007789 gas Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 230000004087 circulation Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000012800 visualization Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000011551 heat transfer agent Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000002473 artificial blood Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/02—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by influencing fluid boundary
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/002—Influencing flow of fluids by influencing the boundary layer
- F15D1/0025—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply
- F15D1/003—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions
- F15D1/005—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions in the form of dimples
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
- F15D1/06—Influencing flow of fluids in pipes or conduits by influencing the boundary layer
- F15D1/065—Whereby an element is dispersed in a pipe over the whole length or whereby several elements are regularly distributed in a pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/10—Influencing flow of fluids around bodies of solid material
- F15D1/12—Influencing flow of fluids around bodies of solid material by influencing the boundary layer
Definitions
- the present invention relates to aerohydrodynamics, power generation, and technologies involving flows of various media, to problems associated with raising the efficiency of transport, to medicine and other spheres of scientific-and-technical activities and engineering practice, in which the success of development and realization of continuous-production processes and equipment and their functional and technical-and-economic performance depend on the quality of flows of continuous medium and on the possibility of controlling the process of interaction between flow and surface by and large and, in particular, controlling the boundary layers of flows of gases and liquids and of their two-phase or multicomponent mixtures for the purpose of reducing aerohydrodynamic loss under conditions of relative motion of surface and continuous medium, reducing the cavitation damage to surfaces, and enhancing the exchange processes on these surfaces.
- the ranges of sizes of the disclosed reliefs are related to the characteristics of boundary layers of flow; in so doing, in accordance with the disclosed solution, the surface subjected to flow contains distributed thereon three-dimensional concave or convex relief elements with rounded transition regions which conjugate these elements with initially smooth surface; any cross section of relief elements, which is parallel to the plane in which three nearest of their peaks lie, has the form of a smooth closed line.
- the technical result of realization of the surface for reduction of friction and aerohydrodynamic drag of surfaces includes:
- the technical result of realization of the surface for enhancement of heat and mass transfer includes:
- the surface for reduction of friction with gaseous and liquid media or their mixtures is characterized in that recesses of double curvature (dimples) are provided on a smooth surface with or without a protective layer, which are formed by second-order convex and concave surfaces conjugate on common tangents; in so doing, the conjugation of dimples with initially smooth surface is accomplished using convex shapes of surfaces forming slopes, for which the initially smooth surface is tangent at points of conjugation; the concave surface, which forms the bottom part of dimple, is made smooth or with a fairing, the ratios of depths h c of dimples to dimensions L 1 of dimples along the direction of flow are found in the range 0.001 ⁇ h c / L 1 ⁇ 0.1 , and the ratio of transverse dimension L 2 of dimple to longitudinal dimension L 1 of dimple is found in the range 0.25 ⁇ L 2 / L 1 ⁇ 1 , with the surface density f of
- the dimples may be made with the longitudinal and/or transverse dimensions varying along the flow.
- the dimples may be made either mechanically, or electrochemically, or by applying a protective layer to the surface with subsequent polymerization of this layer, or by laser processing of the surface, or by employing combinations of these methods.
- the slopes may be formed by a toroidal surface.
- the slopes may be formed by a hyperbolic surface.
- the slopes may be formed by an elliptic surface.
- the surface for enhancement of convective heat and mass transfer with gaseous and liquid media or their mixtures is characterized in that recesses (dimples) are provided on a smooth surface, which are formed by second-order convex and concave surfaces conjugate on common tangents; in so doing, the conjugation of dimples with initially smooth surface is accomplished using convex surfaces forming slopes for which the initially smooth surface is tangent at points of conjugation; the concave surface, which forms the bottom part of dimple, is made smooth or with a fairing, the ratio of depth h c of dimple to dimension L 1 of dimples along the direction of flow is found in the range 0.05 ⁇ h c / L 1 ⁇ 0.5 , and the ratio of transverse dimension L 2 of dimple to its longitudinal dimension L 1 is found in the range 0.25 ⁇ L 2 / L 1 ⁇ 1 , with the surface density f of dimples found in the range 0.1 ⁇ f
- the dimples may be made with the longitudinal and/or transverse dimensions varying along the flow.
- the dimples may be made either mechanically, or electrochemically, or by laser processing of the surface, or by shaping and polymerization of a surface protective layer, or by employing various combinations of these methods.
- the slopes may be formed by a toroidal surface.
- the slopes may be formed by a hyperbolic surface.
- the slopes may be formed by an elliptic surface.
- the dimples on the surface of a heat-transfer plate may be arranged in the staggered or in-line order, and the size of dimples and their depth may be increased or reduced in the direction of flow along the plate.
- Dimples of smaller longitudinal and transverse dimensions and smaller depth may be located around the main dimples.
- Projections reciprocal to recesses are provided on the other side of the surface.
- Ribs oriented along the plate in the direction of flow are provided on the other side of the plate surface.
- Dimples may be arranged on the other side of the plate symmetrically or asymmetrically with respect to the dimples on the main side of the plate.
- the additional surface of the plate which contains dimples, is located relative to the main surface with the formation of a heat-transfer channel; in so doing, the surfaces of the main and additional plates with dimples are facing each other and are located in parallel owing to spacer elements in the form of projections of spherical, conical, cylindrical, or other shapes.
- the size of dimples and their depth are increased or reduced in the direction of flow along or across the pipe.
- Projections with second-order surfaces are located on the inner surface of the pipe.
- Dimples may be located on the outer surface of the pipe, and projections may be located on its inner surface.
- Longitudinal ribs with dimples may be located on the inner surface of the pipe.
- Transverse ribs with dimples may be located on the inner surface of the pipe.
- a curved twisted tape with dimples may be located within the pipe.
- Dimples may be located on the inner surface of the pipe symmetrically or asymmetrically with respect to the dimples on the outer surface.
- the longitudinal and transverse dimensions and the depth of dimples made on the inner surface of the pipe are increased or reduced in the direction of flow.
- Dimples are located on the inner surface of the pipe, and a curved twisted tape with dimples is placed within the pipe.
- the inner surface of the pipe is made without dimples, and a twisted tape with dimples is placed within the pipe.
- TLJS-DR flow intended for reduction of friction drag
- TLJS-HMT heat and mass transfer
- TLJS-DR Tropo-Like Jet Surface-Drag Reduction
- TLJS-HMT Tropo-Like Jet Surface-Heat and Mass Transfer
- a curvilinear relief is applied onto the surface subjected to flow ( Fig. 1 ) in the form of individual dimples 1 of double curvature, each dimple consisting of a concave part 2 of the inner curvilinear surface of dimple, which has a selected curvilinear shape in the form of a second-order surface without acute angles thereon including, for example, a spherical shape with curvature radius R (-) or an elliptic shape with curvature radii R min(-) and R max(-) , conjugated with an initially smooth surface 3 by convex curvilinear slopes of toroidal shape of round, elliptic, parabolic, or hyperbolic cross sections with curvature radii for which the initially smooth surface is tangent at points of conjugation, and the surfaces of concave and convex shapes have common tangents at points of conjugation.
- R min(-) , R max(-) , R min(+) , and R max(+) are determined, as is described above, from relations (Q): 10 - 6 ⁇ R + / R - ⁇ 1 ; 10 - 6 ⁇ R max + / R - ⁇ 1 ; 10 - 6 ⁇ R min + / R - ; 10 - 6 ⁇ R min + / R min - ⁇ 1 ; 10 - 6 ⁇ R max + / R min - ⁇ 1 ; 10 - 6 ⁇ R max + / R min - ⁇ 1 ; 10 - 6 ⁇ R max + / R max - ⁇ 1 ; 10 - 6 ⁇ R min + / R max - .
- the surface for reduction of friction with gaseous and liquid media or their mixtures is characterized in that recesses (dimples) 1 are provided on a smooth surface with a protective layer in the form of polymer material applied onto this surface or without such layer; said dimples are formed by second-order convex 4 and concave 2 surfaces conjugate on common tangents; in so doing, the conjugation of dimples with an initially smooth surface 3 is accomplished using convex surfaces forming slopes, for which the initially smooth surface is tangent at points of conjugation; the concave surface, which forms the bottom part of dimple, is made smooth or with a fairing 5, the ratio of depth h c of dimple to dimension L 1 of dimple along the direction of flow is found in the range: 0.001 ⁇ h c / L 1 ⁇ 0.1 , and the ratio of transverse dimension L 2 of dimple to longitudinal dimension L 1 of dimple is found in the range 0.25 ⁇ L 2 / L 1 ⁇ 1 , with the surface density f of
- the dimples on the surface may be made with their longitudinal and transverse dimensions varying along the flow.
- the dimples may be made either mechanically, or electrochemically, or by shaping and polymerization of a protective layer, or by laser processing of the surface, or by employing combinations of these methods.
- the slopes may be formed either by a toroidal hyperbolic surface, or by a toroidal parabolic surface, or by a toroidal elliptic surface, or by a toroidal spherical surface.
- the slope cross section is a circle bounding the dimple and the concave spherical part of this dimple has the curvature 1/R (-)
- the fairings may be made in the form of dimples, double dimples, or dimples located on the surface of the main dimple ( Figs. 2-4 ).
- the surface for enhancement of convective heat and mass transfer with gaseous and liquid media or their mixtures is characterized in that recesses (dimples) 1 are provided on a smooth surface; said dimples are formed by second-order convex 4 and concave 2 surfaces conjugate on common tangents; in so doing, the conjugation of dimples with an initially smooth surface 3 is accomplished using convex surfaces forming slopes, for which the initially smooth surface is tangent at points of conjugation; the concave surface, which forms the bottom part of dimple, is made smooth or with a fairing 5, and the ratio of depth h c of dimple to dimension L 1 of dimple along the direction of flow is found in the range: 0.1 ⁇ h c / L 1 ⁇ 0.5 , and the ratio of transverse dimension of dimple to longitudinal dimension of dimple is found in the range 0.25 ⁇ L 2 / L 1 ⁇ 1 , with the surface density f of dimples being found in the range 0.1 ⁇ f ⁇
- the dimples on the surface may be made with the longitudinal and/or transverse dimensions varying along the flow.
- the dimples may be made either mechanically, or electrochemically, or by shaping and polymerization of a protective layer, or by laser processing of the surface, or by employing combinations of these methods.
- the slopes may be formed either by a toroidal hyperbolic surface, or by a toroidal parabolic surface, or by a toroidal elliptic surface, or by a toroidal spherical surface.
- the dimples 1 on the surface of heat-transfer plate 6 may be arranged in the staggered or in-line order.
- the size of dimples and their depth may be increased or decreased in the direction of flow along the plate.
- Dimples of smaller dimensions and smaller depth may be symmetrically located around dimples of larger size.
- Projections reciprocal to recesses may be located on the other side of plate 6.
- Ribs 7 oriented along the plate in the direction of flow may be located on the other side of the plate.
- Dimples on the other side of the plate may be arranged symmetrically or asymmetrically with respect to the dimples on the main side.
- the additional surface of plate 12 may be located relative to the main surface of plate 6 with the formation of a heat-transfer channel; in so doing, the surfaces of the main and additional plates with dimples are facing each other and are located in parallel owing to spacer elements 8 in the form of projections of spherical, conical, cylindrical, or other shapes.
- the dimples on the surface of pipe 9 may be arranged in the staggered or in-line order along the pipe and across the pipe.
- the size of dimples and their depth may be increase or reduced in the direction of flow or across the flow.
- Spherical projections (not shown in the drawing), longitudinal ribs 10 or transverse ribs 11, or a twisted tape 13 with dimples may be located on the inner surface of pipe 9.
- Dimples on the inner surface of the pipe may be located symmetrically or asymmetrically with respect to the dimples on the outer surface.
- Dimples may be located on the inner surface of the pipe, the size and depth of which are increased or reduced in the direction of flow along the pipe.
- Dimples may be located on the inner surface of the pipe, and a curved twisted tape with dimples is placed within the pipe.
- the curvature radii of relief, the radii of traces of dimples on the surface being shaped, the depths of relief, and the parameters of fairing in the case where the latter is located in dimples are determined by the foregoing relations and ranges lettered (A), (B), (C), (D), (E), (F), (G), (H), (I), (J), (K), and (Q).
- A lettered
- B C
- D D
- E E
- F F
- G H
- I I
- J J
- K K
- the basic aerohydrodynamic characteristics are determined of flows of gases, liquids, or their two-phase mixtures in the case of formation of disclosed flow with built-in tornado-like jets in channels, or analogous characteristics for a body moving in the above-said media.
- the ranges are established of possible variation of the thermal properties of working medium, the characteristic dimension is determined which defines the conditions of relative motion of continuous medium and surface, the Reynolds number (Re) is calculated and possible ranges of variation of its values are determined.
- the results of analysis are used for varying the values of Re for the purpose of fitting possible values of radii (dimensions) of the trace of dimples on the surface being shaped with a view to accommodating their integral-valued amounts along and across the flow and in the direction of motion of the body.
- the shape of dimples, their curvature radii, and the density of relief f are selected using the ranges of their variation lettered (A), (B), (C), (E), and (Q).
- f ⁇ ⁇ r c 2 / t 1 ⁇ t 2 , t 1 and t 2 , i.e., the transverse and longitudinal spacings between dimples on an initially smooth surface, respectively, are fitted such that, given the optimal closeness to the preassigned value of f, the number of dimples along and across the surface being shaped would be integral-valued.
- h c /r c which is lettered (A) or (H) depending on the problem being solved, is used to calculate the depth h c of the relief being constructed.
- A lettered
- H height
- the surface shaping technology is developed, the appropriate tools are prepared, and channels or supporting surfaces are manufactured.
- the disclosed invention is based on the phenomenon discovered by the authors approximately 30 years ago, namely, the phenomenon of self-organization of quasi-potential tornado-like jets of gases, liquids, and/or their two-phase mixtures in recesses with second-order boundary surface and of rearrangement of the boundary layer on such surfaces under conditions of flows of said media past surfaces with recesses.
- This phenomenon was experimentally investigated, theoretically described, visualized, and tested under laboratory and full-scale conditions in a wide range of velocities and pressures, including the ranges of subsonic and supersonic velocities of air flows, and at critical and supercritical parameters of liquid heat-transfer agents.
- TJ Tornado-Like Jet
- TLJSOP Tornado-Like Jet Self-Organization
- the flow of medium or motion of bodies in the medium are characterized by Reynolds number values of Re ⁇ 500 calculated by the size of dimples along the flow or in the directions of motion of the body; the selected shapes and dimensions of curvature of the convex and concave parts of relief initiate the impact, which is made on the flow by the field of forces absent in the case of flow past smooth surfaces, and the restructuring of the boundary layer of flow from shear layer in its initially smooth regions to three-dimensional vortex boundary layer on curvilinear surface consisting of surface vortexes such as Görtler vortexes or their ensembles.
- the dimensionless relation (K), which involves the radius vector of surface curvature R (+) or R (-) (hereinafter referred to as radius), the viscosity of the medium v, the velocity vector of unperturbed flow of continuous medium U ⁇ , and the momentum thickness ⁇ 2 (x) in the boundary layer of flow, is the criterion of stability with respect to emergence in the boundary layer of surface vortexes such as Görtler vortexes and points to the possibility of controlling the vortex boundary layer with the aid of the parameters of flow of continuous medium and the curvature radius of the surface subjected to flow.
- FDMBL Finely Divided Moving Boundary Layer
- the tornado-like jets are formed, as was observed above, in dimples on the "surface-moving medium" interface under the effect of forces caused by the shapes of selected relief, including:
- the values of the above-said forces and the directions of their action on the structure of flow being formed are controlled by the preassigned shapes of dimples of double curvature, by the density of distribution of dimples with respect to the area of initially smooth surface, and by the modes of motion of flow of medium.
- the "continuous medium-surface subjected to flow" interface is imparted a curvilinear shape in the form of regularly alternating dimples of double curvature which develop force action to provide in the flow the self-organization in these zones of FDBML and secondary swirling jets directed away from said surface zone of flow into the main flow.
- the arising forces cause an independent force action on the moving medium, which results in the curvature of shapes of lines of flow and, as a consequence, in the self-organization of tornado-like jets.
- the dimple relief made on surfaces subjected to flow causes the variation of the structure of boundary layer of flow on the boundary surfaces and gives rise to the self-organization of tornado-like jets which suck off a part of continuous medium concentrated in the zone of location of dimples on the surface subjected to flow, thereby affecting the level of dissipation of energy of the flow and intensifying the exchange processes between swirling jet and surface.
- the choice of curvature radii and dimensions of curvilinear regions of the surface subjected to flow is based on the results of theoretical calculations supported by experimental results, the technology of producing dimples on the surface is developed, and provision is made for the validity of the conditions of self-organization of secondary tornado-like jets built in the flow past the surface.
- the flow of working continuous medium is directed to the surface shaped with dimples, or a relief of desired shape is made on the surface of bodies moving in a medium of gases, liquids, or their two-phase mixtures to attain the reduction of friction drag on shaped surfaces and enhance the processes of heat and mass transfer between the energy-exchange surface and flows of continuous medium.
- the disclosed surfaces are employed for reducing aerohydrodynamic drag of pressure channels and various bodies in the state of relative motion with continuous medium and/or for raising the functional efficiency of energy-exchange processes and equipment, including heat-transfer and mass-transfer processes, as well as in all other spheres where, compared to the conventional methods of heat and mass transfer, it is necessary to intensify exchange processes under conditions of restricted rise or reduction of hydraulic drag and reduce the cavitation wear of the surfaces of hydraulic turbines, hydraulic pumps, propellers of marine propulsion units, and other units operating in liquid medium.
- the present invention finds application in various means of transportation including aircraft, automobiles, high-speed railroad trains, sea-going and river-going vessels; in gas-turbine units with cooled blades, in nuclear-power uranium assemblies, in steam generators, in various heat-exchangers, in recuperators and other energy-exchange apparatuses and devices; in household appliances such as air conditioners, fans, heating equipment and in kitchen appliances such as tea kettles, pots, fiying pans etc.; in sports goods of various kinds including sports cars, motorcycles, bicycles, sportswear for motor sports, bicycle racing, swimming, running etc.; in various biochemical processes involving the motion of gaseous or liquid reagents, as well as in developing apparatuses and prostheses for blood circulation systems, in medical devices for artificial blood supply and for purifying blood from harmful impurities, in artificial respiration equipment, and so on; in other words, in technologies involving flows of various media, in which the process efficiency is defined by the motion of gases, liquids and their two-phase and/or multicomponent mixtures
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2006/000465 WO2008033045A1 (fr) | 2006-08-31 | 2006-08-31 | Surface réduisant le frottement et surface destinée à intensifier l'échange massique et thermique |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2103818A1 true EP2103818A1 (fr) | 2009-09-23 |
| EP2103818A4 EP2103818A4 (fr) | 2010-03-10 |
| EP2103818B1 EP2103818B1 (fr) | 2013-09-18 |
Family
ID=39184012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06847404.8A Not-in-force EP2103818B1 (fr) | 2006-08-31 | 2006-08-31 | Surface reduisant le frottement et surface destinee a intensifier l'echange massique et thermique |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2103818B1 (fr) |
| WO (1) | WO2008033045A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2447153A1 (fr) * | 2010-10-28 | 2012-05-02 | Zuei-Ling Lin | Procédé pour améliorer l'efficacité de sortie d'une hélice et pour réduire son bruit |
| WO2013173217A1 (fr) * | 2012-05-13 | 2013-11-21 | Loveday Ronald Lee | Conduite pour écoulement de fluide et transfert de chaleur améliorés |
| WO2018044155A1 (fr) | 2016-09-01 | 2018-03-08 | Technische Universiteit Delft | Corps pourvu d'une zone superficielle conçue pour réduire la traînée |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9322690B2 (en) | 2013-01-28 | 2016-04-26 | Canada Pipeline Accessories, Co. Ltd | Metering tubes for improved fluid flow measurement |
| EP3184462A1 (fr) | 2015-12-23 | 2017-06-28 | Sulzer Mixpac AG | Cartouche avec un frottement réduit |
| US10808540B2 (en) * | 2018-03-22 | 2020-10-20 | Raytheon Technologies Corporation | Case for gas turbine engine |
| CN115238490B (zh) * | 2022-07-12 | 2025-09-09 | 长安大学 | 基于包络特征的路面抗滑性能评价方法及评价装置 |
| AT527150A1 (de) * | 2023-05-08 | 2024-11-15 | Adrian Leitl Peter | Hocheffiziente Riblet-Struktur sowie Verfahren zur Herstellung einer solchen |
| AT527151A1 (de) * | 2023-05-08 | 2024-11-15 | Adrian Leitl Peter | Riblet-Struktur sowie Verfahren zur Herstellung einer solchen |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1086246A1 (ru) * | 1979-12-05 | 1984-04-15 | Vinogradov Evgenij S | Поверхность,обтекаема жидкостью или газом |
| JPH06100432B2 (ja) * | 1984-06-20 | 1994-12-12 | 株式会社日立製作所 | 伝熱管 |
| RU2020304C1 (ru) | 1992-03-31 | 1994-09-30 | Геннадий Ираклиевич Кикнадзе | Поверхность обтекания для формирования динамических вихревых структур в пограничных и пристенных слоях потоков сплошных сред |
| KR0132015B1 (ko) * | 1993-02-24 | 1998-04-20 | 가나이 쯔도무 | 열 교환기 |
| CN1138967C (zh) * | 1995-07-19 | 2004-02-18 | 尼古劳斯·维达 | 控制连续介质的边界或壁层的方法和装置 |
| JPH1182860A (ja) * | 1997-08-30 | 1999-03-26 | Junichi Hirata | 流動量増大流路 |
| DE10347022A1 (de) * | 2003-10-07 | 2005-05-04 | Nikolaus Vida | Oberfläche mit reduzierter Partikelablagerung und reduzierter Eisbildung |
| EP1860330A4 (fr) * | 2005-03-04 | 2011-02-16 | Gennady Iraklievich Kiknadze | Procede de formation d'un courant de formation de jets tourbillonnants integres a un flux et surface conçue pour sa mise en oeuvre |
-
2006
- 2006-08-31 EP EP06847404.8A patent/EP2103818B1/fr not_active Not-in-force
- 2006-08-31 WO PCT/RU2006/000465 patent/WO2008033045A1/fr not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2447153A1 (fr) * | 2010-10-28 | 2012-05-02 | Zuei-Ling Lin | Procédé pour améliorer l'efficacité de sortie d'une hélice et pour réduire son bruit |
| WO2013173217A1 (fr) * | 2012-05-13 | 2013-11-21 | Loveday Ronald Lee | Conduite pour écoulement de fluide et transfert de chaleur améliorés |
| US9845902B2 (en) | 2012-05-13 | 2017-12-19 | InnerGeo LLC | Conduit for improved fluid flow and heat transfer |
| WO2018044155A1 (fr) | 2016-09-01 | 2018-03-08 | Technische Universiteit Delft | Corps pourvu d'une zone superficielle conçue pour réduire la traînée |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2103818B1 (fr) | 2013-09-18 |
| WO2008033045A1 (fr) | 2008-03-20 |
| EP2103818A4 (fr) | 2010-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0679812B1 (fr) | Surface profilee | |
| Zaresharif et al. | Cavitation control using passive flow control techniques | |
| Abdulbari et al. | Bio‐inspired passive drag reduction techniques: a review | |
| EP2103818B1 (fr) | Surface reduisant le frottement et surface destinee a intensifier l'echange massique et thermique | |
| US20130153184A1 (en) | Heat exchanger | |
| Young et al. | Numerical modeling of supercavitating propeller flows | |
| US20210388858A1 (en) | Method, system and apparatus for reducing fluid drag | |
| Kuzma-Kichta et al. | Choice and justification of the heat transfer intensification methods | |
| US20210231141A1 (en) | Staggered periodic riblets | |
| EP1604122B1 (fr) | Structure de surface tridimensionnelle connue pour assurer une resistance au frottement reduite et un echange thermique ameliore | |
| JPS6334393B2 (fr) | ||
| US12085102B2 (en) | Submerged periodic riblets | |
| RU2425260C2 (ru) | Поверхность тела для уменьшения трения и поверхность тела для интенсификации теплообмена | |
| Nasr et al. | The thermo-aerodynamic performance of turbulent channel flow over dimples of different sizes | |
| CN101947748B (zh) | 一种能有效增强软性磨粒流湍流的流道装置 | |
| Zhang et al. | Flow characteristics in free impinging jet reactor by particle image velocimetry (PIV) investigation | |
| EP1860330A1 (fr) | Procede de formation d'un courant de formation de jets tourbillonnants integres a un flux et surface conçue pour sa mise en oeuvre | |
| Lama et al. | Experimental and numerical study for the cross-flow around four cylinders in an in-line square configuration | |
| Yamagishi et al. | Numerical simulation of flow around a circular cylinder with curved sectional grooves | |
| Khalatov et al. | Flow characteristics within and downstream of spherical and cylindrical dimple on a flat plate at low Reynolds numbers | |
| RU2691705C1 (ru) | Способ отсасывания пограничного слоя сплошной среды с поверхности тела и устройство для его реализации | |
| Zhou et al. | Numerical analysis of drag reduction characteristics of biomimetic puffer skin: effect of spinal height and tilt angle | |
| Yu et al. | Lattice Boltzmann investigation of the influence of slip distributions on the flow past a diamond cylinder at low-Reynolds-number | |
| Wang et al. | Study of flow formed by three coplanar impinging pipe jets at inclination angles of 30° and 45° | |
| Khalatov et al. | Flow characteristics within and downstream of a single shallow cylindrical and spherical dimple: Effect of pre-dimple boundary layer thickness |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20090326 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
|
| DAX | Request for extension of the european patent (deleted) | ||
| A4 | Supplementary search report drawn up and despatched |
Effective date: 20100204 |
|
| 17Q | First examination report despatched |
Effective date: 20110208 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| INTG | Intention to grant announced |
Effective date: 20130416 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 632951 Country of ref document: AT Kind code of ref document: T Effective date: 20131015 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602006038518 Country of ref document: DE Effective date: 20131114 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130807 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20130918 |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 632951 Country of ref document: AT Kind code of ref document: T Effective date: 20130918 |
|
| REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131219 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140118 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602006038518 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140120 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20140619 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602006038518 Country of ref document: DE Effective date: 20140619 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 9 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140831 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20140831 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140831 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140831 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20150217 Year of fee payment: 9 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: AECN Free format text: DAS PATENT IST AUFGRUND DES WEITERBEHANDLUNGSANTRAGS VOM 30. JUNI 2015 REAKTIVIERT WORDEN. |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140831 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140831 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20150630 Year of fee payment: 9 |
|
| PGRI | Patent reinstated in contracting state [announced from national office to epo] |
Ref country code: CH Effective date: 20150701 Ref country code: LI Effective date: 20150701 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150831 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150831 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20160429 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20060831 Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130918 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150831 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20161108 Year of fee payment: 11 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602006038518 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180301 |