[go: up one dir, main page]

WO1991017917A1 - Sous-marin - Google Patents

Sous-marin Download PDF

Info

Publication number
WO1991017917A1
WO1991017917A1 PCT/GB1991/000783 GB9100783W WO9117917A1 WO 1991017917 A1 WO1991017917 A1 WO 1991017917A1 GB 9100783 W GB9100783 W GB 9100783W WO 9117917 A1 WO9117917 A1 WO 9117917A1
Authority
WO
WIPO (PCT)
Prior art keywords
submarine
control member
flow control
discontinuity
outer skin
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.)
Ceased
Application number
PCT/GB1991/000783
Other languages
English (en)
Inventor
Jeffrey Charles Broadhurst
Harold James Armstrong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dowty Woodville Polymer Ltd
Original Assignee
Dowty Woodville Polymer Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dowty Woodville Polymer Ltd filed Critical Dowty Woodville Polymer Ltd
Publication of WO1991017917A1 publication Critical patent/WO1991017917A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
    • B63G8/14—Control of attitude or depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
    • B63G8/04—Superstructure
    • B63G8/06—Conning-towers

Definitions

  • This invention relates to a submarine and a flow control member to enhance the flow of water relative to a submarine travelling through the water.
  • a known problem with submarines is the drag they experience and the resultant noise created as they pass through the water. Whilst this problem is reduced by designing a submarine to have a smoothly curved shape, it is not always possible to eliminate all discontinuities of shape.
  • a further problem associated with submarines is the hydrodynamic effect of the fin or sail of the submarine.
  • the fin is the large vertical structure which surrounds a conning tower of the submarine. As the submarine turns, the fin generates a force acting perpendicularly to it. This lateral force is undesirable because it tends to roll the submarine.
  • Accessways can comprise steps but often take the form of walkways about the fin and hull interface. It is not possible for these to be designed to conform to the general smoothly curved shape of the submarine because such curved surfaces would prove difficult or even dangerous to walk on when wet.
  • a submarine having a fin and a flow control member located in relation to the fin so as to be moveable between a stowed position and a deployed position to modify the flow of water past the fin.
  • the hydrodynamic properties of the fin are altered enabling the force produced by the fin in a turn to be reduced or substantially eliminated or where, alternatively, the flow control member bridges a discontinuity between the fin and hull reduces the noise produced by the discontinuity.
  • the or each flow control member has a variable shape to permit the hydrodynamic properties of the fin to be varied.
  • control means is included to determine the required shape for a desired rate of turn, the means conveniently, comprising a computer linked between the helm or auto pilot of the submarine, and a set of valves controlling the deployment.
  • the flow control member is deployed by inflation although for some applications the flow control member may be hinged and deployed by means of hydraulically operated arms.
  • the flow control member is located in relation to a discontinuity in the external surface of the submarine so as to be moveable between a stowed position in which the discontinuity is exposed to the flow of water and a deployed position in which the control member bridges the discontinuity to modify the flow of water past the discontinuity.
  • the discontinuity may be an accessway which may be reinstated when required by moving the flow control member to the stowed position.
  • the use of the present invention on a submarine means that the turbulence which would be created by the discontinuity as the submarine travels through the fluid is drastically reduced, and hence the cavitation problem is reduced; and the radar and sonar reflective discontinuities in the surface are removed and/or masked.
  • the use of the present invention improves the flow pattern of the fluid with respect to the discontinuity. In effect this means that the turbulence created by the passage of the submarine through the fluid in the region of the discontinuity is reduced, and therefore the drag coefficient of the submarine is improved as the drag is reduced.
  • the reduction in the turbulence created by the passage of the submarine means that the large variations in pressure brought about by the vortices created, is reduced if not eliminated, and therefore in water, the cavitation that may result therefrom is eliminated or reduced. Consequently, the noise created by the passage of the submarine through the water is reduced.
  • the flow control member is disposed in the flow path to the propulsive means of the submarine, the flow of fluid into the propulsive unit is made less turbulent. This in turn means that the efficiency of the propulsive unit is improved.
  • the flow control member is inflated using the water of the surrounding environment.
  • the flow control member is preferably provided with a sensor or sensors that detect the surrounding environmental pressure and control pump means which inflates the flow control members.
  • the flow control members are inflated by means of a fluid which is stored in the submarine, for example water, air or gas such as inert gas.
  • a flow control member made in accordance with the present invention is provided with a variable geometry capability.
  • the flow control member may include symmetric or asymmetric geometry.
  • the flow control member comprises two inflatable members which co-operate longitudinally along their length to provide the smooth surface transition, i.e. a set of co-operating flow control members.
  • the flow control member provided may comprise a single member, or a singular set of co-operating members it is envisaged, particularly in the situation where the members are readily moveable, that a series of members or sets of co ⁇ operating members is provided. This further enhances the variable geometry capability of the flow control member.
  • each of the flow control members comprises an outer skin; a skin member which with the outer skins acts so as to form a bag like member; and a series of diaphragms which are spaced apart in the bag like member and interconnect the outer skin and the skin member.
  • the diaphragms provide the flow control members with a degree of dimensional stability and prevent the outer skin from adopting an undesired shape profile as a result of the over pressure within the flow control member.
  • the diaphragms may be used to divide the space within the bag like member into a number of pockets to allow variation in shape to be achieved.
  • the space within the bag like member will be maintained as a single communicative space.
  • the outer skin may comprise a series of articulated metallic plates, which may additionally be provided with a layer of polymeric material.
  • the outer skin is manufactured from, or is provided with, a layer of anechoic polymeric material.
  • the outer skin is provided with an electrically conductive capability.
  • the outer skin includes articulated metallic plates
  • these metal plates provide the electrically conductive capability.
  • electrically conductive capability is preferably provided by means of embedded metal wires.
  • the outer skin should have sufficient strength to resist damage by foreign, bodies, for example, flotsam or ice.
  • the flow control member may be incorporated in the submarine during manufacture or according to a further aspect of the invention provided as a retro-fit.
  • Figure 1 shows a sectional side view of a flow control member made in accordance with the present invention
  • Figure 2 shows a second sectional side view of the flow control member as shown in Figure 1;
  • Figure 3 shows a schematic representation of the shape of the flow control member under varying flow conditions
  • Figure 4 shows a sectional side view of a second flow control member made in accordance with the present invention
  • Figure 5 shows a schematic end view of a submarine in accordance with the invention
  • Figure 6 shows a schematic plan view of the submarine shown in Figure 5;
  • Figures 7 to 10 show a submarine in accordance with a second aspect of the invention.
  • Figures 11 to 12 show a second embodiment of the submarine in accordance with the second aspect of the invention.
  • FIG. 1 there is shown a flow control member 1 made in accordance with the present invention which is moveable to enhance the flow of fluid relative to a discontinuity in the surface of a submarine.
  • the flow control member 1 comprises an upper inflatable section 3; and a lower inflatable section 4 which in the inflated state abut at an interface 2.
  • Both the upper and the lower inflatable sections are each constructed as an inflatable compartment 5 and 6, comprising an outer skin 7 which is in contact with the surrounding environment when deployed; a skin member 9 which is connected to the submarine wall; and a series of diaphragms 8 which are connected between the outer skin 7 and the skin member 9.
  • the diaphragms 8 in this example do not act to divide the inflatable compartment 5 or 6 into several individual pockets, they have been provided so as to give the inflatable sections a degree of dimensional stability.
  • the outer skin 7 of the inflatable compartment in this example is manufactured from either a polymeric material; or a series of articulated metallic plates which may also be provided with an outer layer of polymeric material.
  • the outer skin 7 is provided with a layer of, or is manufactured from, an anechoic polymer.
  • the outer skin 7 may also include an electrically conductive means to adsorb the radar signals. In the case where metallic articulated plates are used, these will provide the electrically conductive means. However, where the outer skin 7 is a polymeric material, electrically conductive means, such as wires, are disposed therein.
  • the outer skin 7 is manufactured so that the inflatable sections will not sustain damage when impacted by foreign bodies, such as flotsam and ice.
  • the diaphragms 8 are made from a resistant polymeric material and act to prevent the outer skin 7 from being displaced outwardly to an excessive degree by the pressure within the inflatable compartment when inflated.
  • the flow control member 1 is shown disposed between the sides of a discontinuity in a surface, which sides are perpendicular to one another.
  • the upper inflatable section 3 is secured to the vertically extending side of the discontinuity, and the lower inflatable section 4 is secured to the horizontally extending side of the discontinuity.
  • the outer skins 7 co-operate with one another so as to provide a smooth surface transition between the two sides of the discontinuity.
  • the diaphragms 8 within the inflatable compartments are disposed as follows.
  • the upper inflatable section 3 has five substantially horizontal diaphragms which are disposed parallel to one another between the respective outer skin 7 and the respective skin member 9; and the lower inflatable section 4 has eight diaphragms; the four closest to the contact between the respective outer skin 7 and the respective skin member 9 of the discontinuity are disposed vertically parallel to one another and the remaining five are disposed between the outer skin 7 and the skin member 9 at the point of the discontinuity.
  • the outer skins 7 of the lower and upper inflatable sections 3 and 4 are disposed substantially parallel to the walls of the discontinuity to which it is secured as shown in Figure 2.
  • the actual shape which will be induced in the outer skin 7 is dependent upon the forces acting, on the outer skin 7, that is to say, the forces exerted by the internal inflation medium of the inflatable sections; the external environment surrounding the inflatable sections; the additionary or subtractory forces induced by the movement of the body through the environment; and the restraining action of the diaphragms 8.
  • Figure 3 of the drawings shows a schematic plot of several forms of the shape which will be induced in the outer skin 7 of both of the inflatable sections by the above detailed forces. Obviously the actual shape induced is dependent upon the balance of these forces, and will not be constant but vary as the balance of these forces varies.
  • FIG. 4 of the drawings a second form of a flow control member made in accordance with the present invention is shown.
  • This second form of flow control member is similar to that described with reference to Figures 1 and 2 of the drawings and therefore like numerals refer to like components.
  • the diaphragms 8 of which there are five are disposed between the outer skin 7 at points along its length and the skin member 9 at a position on the skin member 9 closest to the actual discontinuity.
  • the diaphragms 8 of which are ten are disposed between the outer skin 7 at points along its length and the skin member 9 at the point of the discontinuity.
  • a submarine is shown with the flow control member 1 in place.
  • the flow control member 1 is shown in position over a discontinuity, shown in phantom.
  • the discontinuity is the interface between the main body or hull of the submarine and the fin/sail which is angularly shaped in order to form a safe walkway about the fin/sail.
  • the flow control member 1 in this case must be provided with an inflatory and deflatory capability, where the skin 7 of the lower inflatable section 4 in the deflated state provides the surface on which the people actually walk.
  • the flow control member 1 is inflated and deflated, with sea water, using a pump system (not shown).
  • the actual pressure within the inflatable sections 3 and 4 is directly proportional to the actual pressure of the surrounding environment and therefore the depth of the submarine.
  • the pressure within the inflatable sections 3 and 4 is maintained at a pressure, for example 50psi, slightly in excess of the pressure of the surrounding environment in order to maintain the desired profile, and in particular the smooth transition between the angle of the relevant surfaces.
  • FIG 7 A further embodiment of the invention is shown in Figure 7, in which a fin 10 of a submarine 11 is fitted with inflatable sections 12 and 13 on either side of the fin 10.
  • the sections 12, 13 are formed in a similar way to the earlier described embodiments that is to say they have an inner and outer skin with transverse shape controlling diaphragms.
  • section 12 When inflated, section 12 (and similarly section 13) protrudes from the fin 10 as more clearly shown in Figure 8 to change the cross-section of the fin 10.
  • the fin 10 presents an angle of attack which would result in a lateral force being generated acting in the direction of arrow 15 to roll the submarine 11.
  • the section 12 is inflated with water to vary the hydrodynamic properties of the fin 10 to prevent the lateral force being generated.
  • Section 13 is similarly inflated to prevent a lateral force being generated if the submarine 11 is turned to the left. In both cases, the inflation is controlled by a computer system (not shown) linked to the helm of the submarine 11.
  • the submarine 11 is also provided with inflatable members 16 about the interface of the hull 17 and the fin 10 to smooth the discontinuity in shape therebetween whilst as in the earlier described embodiments, providing a safe walkway when deflated.
  • the inflatable members vary in section as shown in figures 9a to 9b to present a smoothly changing profile.
  • the sections 12 and 13 can be inflated to present different profiles.
  • Figure 12 shows the various profiles 18a, b and c that may be adopted by the inflatable sections 12 and 13 to cope with different rates of turn of the submarine 11.
  • Profile 18a is adopted for a relatively low rate of turn whilst 18c is adopted for a maximum rate turn, with 18b being the profile adopted between these extremes.
  • the section 12 and 13 extend to the hull 17 to provide a smoother change in shape to further reduce noise and drag.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)

Abstract

Une discontinuité dans la forme d'un sous-marin, créée par l'aménagement d'une coursive, est pourvue d'un élément de régulation d'écoulement (1) comprenant une pellicule externe (7) et une pellicule interne (9) formant des parties gonflables (3 et 4). Les parties (3 et 4) sont gonflées d'eau afin de présenter une surface à courbes douces camouflant la discontinuité facilitant l'écoulement de l'eau alors que le sous-marin se déplace, réduisant ainsi le bruit produit par le déplacement. Lorsque le sous-marin remonte à la surface, les parties (3 et 4) peuvent être dégonflées afin de rendre à la coursive sa forme angulaire. Selon un second mode de réalisation, l'écoulement de l'eau autour d'un kiosque ou d'un aileron d'un sous-marin est modifié par un élément gonflable afin de réduire la force latérale produite par le kiosque de timonerie.
PCT/GB1991/000783 1990-05-16 1991-05-16 Sous-marin Ceased WO1991017917A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909011007A GB9011007D0 (en) 1990-05-16 1990-05-16 Means to enhance the flow of fluid
GB9011007.3 1990-05-16

Publications (1)

Publication Number Publication Date
WO1991017917A1 true WO1991017917A1 (fr) 1991-11-28

Family

ID=10676106

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/000783 Ceased WO1991017917A1 (fr) 1990-05-16 1991-05-16 Sous-marin

Country Status (3)

Country Link
AU (1) AU7869791A (fr)
GB (2) GB9011007D0 (fr)
WO (1) WO1991017917A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2196699C1 (ru) * 2001-06-28 2003-01-20 Санкт-Петербургский государственный технический университет Способ снижения уровня колебаний давления жидкости в потоке, обтекающем объект, и устройство для его осуществления
EP1873051A1 (fr) * 2006-06-30 2008-01-02 Technische Universiteit Delft Navire
RU2767657C1 (ru) * 2021-03-03 2022-03-18 Акционерное общество "Центр судоремонта "Звездочка" (АО "ЦС "Звездочка") Лопастной винт

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191115875A (en) * 1911-07-08 1911-08-17 Edward Lasius Peacock Improvements in Submarine or Submergible Boats.
US1402496A (en) * 1921-05-03 1922-01-03 Lake Torpedo Boat Company Housed cleat for submarine boats
GB910053A (en) * 1959-07-22 1962-11-07 Spirotechnique Vessel for underwater diving
US3093105A (en) * 1959-08-14 1963-06-11 Loral Electronics Corp Control arrangement for a submarine vessel
US3797433A (en) * 1971-11-01 1974-03-19 Air Logistics Corp Submarine stabilization
US3977349A (en) * 1974-11-27 1976-08-31 Max Hummel Boat positioning device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223821B (en) * 1982-01-22 1990-07-25 Secr Defence Apparatus and method for modifying the dynamic interaction between a fluid and a object

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191115875A (en) * 1911-07-08 1911-08-17 Edward Lasius Peacock Improvements in Submarine or Submergible Boats.
US1402496A (en) * 1921-05-03 1922-01-03 Lake Torpedo Boat Company Housed cleat for submarine boats
GB910053A (en) * 1959-07-22 1962-11-07 Spirotechnique Vessel for underwater diving
US3093105A (en) * 1959-08-14 1963-06-11 Loral Electronics Corp Control arrangement for a submarine vessel
US3797433A (en) * 1971-11-01 1974-03-19 Air Logistics Corp Submarine stabilization
US3977349A (en) * 1974-11-27 1976-08-31 Max Hummel Boat positioning device

Also Published As

Publication number Publication date
GB2244458B (en) 1993-10-13
GB2244458A (en) 1991-12-04
GB9110717D0 (en) 1991-07-17
GB9011007D0 (en) 1990-10-10
AU7869791A (en) 1991-12-10

Similar Documents

Publication Publication Date Title
US6571724B1 (en) Stern depressor type motion stabilization system for marine vessel
US6148751A (en) Vibration and drag reduction system for fluid-submersed hulls
RU2150401C1 (ru) Глиссер
KR920014685A (ko) 제한된 가로 조정토오크(rectifying torque)와 감소된 전진저항을 갖는 배수량과 다중선체 배
KR970010819B1 (ko) 고속동력보우트
IL305414A (en) Angiopoietin-like 3 (ANGPTL3) IRNA compositions and methods of using them
WO1991017917A1 (fr) Sous-marin
WO2005045136B1 (fr) Brise-lames flottant et systeme de propulsion
EP0794892A1 (fr) Procede et moyens destines a l'equilibrage dynamique d'une carene planante ou semi-planante rapide
US5921195A (en) Apparatus for coastal navigation and self rescue
CA2069751C (fr) Coque de bateau
RU2398705C2 (ru) Волностойкий самоходный катамаранный комплекс
US8065970B2 (en) High-speed multihull boat
CN102951256A (zh) 船舶船体
JP3210309U (ja) 運航安定装置を備えた船舶
RU2052363C1 (ru) Судно на воздушной подушке
US4166515A (en) Sidewall gas-cushion vehicles
CA1237607A (fr) Bulbe arriere de navire
SE434248B (sv) Batskrov for deplacementbat
Stahl Experimental investigations of asymmetric vortex flows behind elliptic cones at incidence
GB2252539A (en) Steering system
RU2271962C2 (ru) Плавсредство
RU2203825C2 (ru) Плавучее средство
US12122490B2 (en) Flat-bottom fluvial transport boat comprising inflatable buoyancy tanks
SU1565747A1 (ru) Гидродинамический активный успокоитель качки

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE