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EP1566333B1 - Underwater exhaust arrangement - Google Patents

Underwater exhaust arrangement Download PDF

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Publication number
EP1566333B1
EP1566333B1 EP05300083A EP05300083A EP1566333B1 EP 1566333 B1 EP1566333 B1 EP 1566333B1 EP 05300083 A EP05300083 A EP 05300083A EP 05300083 A EP05300083 A EP 05300083A EP 1566333 B1 EP1566333 B1 EP 1566333B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
ship
hull
deflector
box
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.)
Expired - Lifetime
Application number
EP05300083A
Other languages
German (de)
French (fr)
Other versions
EP1566333A1 (en
Inventor
Florent Longer
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.)
Chantiers de lAtlantique SA
Original Assignee
Aker Yards SA
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 Aker Yards SA filed Critical Aker Yards SA
Publication of EP1566333A1 publication Critical patent/EP1566333A1/en
Application granted granted Critical
Publication of EP1566333B1 publication Critical patent/EP1566333B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/32—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels

Definitions

  • the present invention relates to ships and more particularly the exhaust of said vessels.
  • the air exhaust has the disadvantage of being noisy, generating unpleasant odors and creating plumes of smoke that are not aesthetic and are easily spotted.
  • Submarine exhausts operate only at high speed (generally at speeds greater than 9 knots), are placed close to the waterline and have an external part called the outer baffle or "spoon" to avoid the entering the water into the exhaust and protecting the engines from the back pressure exerted by the water.
  • This system although easy to perform, is very sensitive to ship and swell movements, as there is a risk of introducing water into the engines.
  • the position close to the waterline causes a risk of blockage by the ice and a deterioration of the outer pipe by floating objects or just the edge of the dock. Odors are not completely suppressed due to the low dispersion of gases in the water.
  • the movement of the ship and the swell can clear the exhaust of the water so the smoke is directly in the air.
  • the object of the present invention is to provide a hull of a ship equipped with a submarine escape device that is both simple, operating at low speed and releasing little smoke in the air near the ship.
  • the submarine escape device which equips the hull of the ship according to the invention, consists of an exhaust box connected to the gas evacuation network via an exhaust duct, said box being arranged at the level of an exhaust outlet located on this hull, it is equipped with a deflector located tangentially to said hull.
  • the tangential baffle gives a smooth profile to the hull of the ship which allows to go into submarine mode at low speeds and avoids the risk of collision with floating objects.
  • Such a system is extremely complex because it implements a movable member actuated cylinder.
  • the fin protrudes from the hull of the ship, and may collide with floating objects.
  • the deflector has the shape of an inverted spoon.
  • the substantially rounded shape of the outside of the spoon accelerates the flow of the interior of the exhaust and promotes the evacuation of water, while the hollow form of the inside of the spoon takes off. the water nets from the hull and creates a ventilation zone at the back of the profile.
  • the profile ensures a sufficient vacuum zone inside the exhaust duct for the evacuation of gases.
  • the deflector has a horizontal width equivalent to 2/3 of the horizontal width of the exhaust outlet. This size is optimum to facilitate the evacuation of gases without causing water entry into the exhaust box.
  • the exhaust duct is horizontal.
  • the escapement is placed below the waterline.
  • the very deep position of the exhaust outlet makes it possible to reduce external noise and atmospheric emissions, and to eliminate both the risk of passage in the open air in case of movements of the ship or swell and the risk of being caught in the ice.
  • the exhaust is located more than 50cm from the waterline.
  • the exhaust duct is at an angle of 30 to 40 ° with respect to the hull of the ship. This horizontal inclination of the exhaust duct relative to the deflector allows an optimization of the flows.
  • the ship 1 has an escapement 2 disposed below the level of the water line 3 at a distance from said surface (cf. figure 1 ).
  • the exhaust 2 comprises an exhaust pipe 4 and connected to the exhaust network 8 of the gases and a box 5 disposed inside at the exhaust outlet 7 and not extending beyond the hull 10 of the vessel 1 (cf. figure 2 ).
  • the duct 4 and the box 5 make an angle ⁇ with the shell 10.
  • the angle ⁇ is measured from the front portion 10a of the shell 10 and is between 30 and 40 °.
  • the box 5 is partially closed by a deflector 6 fixed on the side of the box 5 at the front portion 10a.
  • the deflector 6 is oriented towards the front of the ship 1 so that during the displacement of the vessel 1 the entry of the water is minimal.
  • the deflector 6 has the shape of a spoon whose hollow portion 60 is in the extension of the portion 10a of the hull 10 and directed towards the outside of the ship 1.
  • the curved portion 61 is placed inside the hull 10.
  • the two faces 60 and 61 of the deflector 6 converge towards the rear of the ship 1 so that the front face 62 of the deflector 6 is wider than the rear portion 63.
  • F is the direction of displacement of the water with respect to the hull 10
  • the box 5 is filled with water, the exhaust network 8 gases being then in aerial mode.
  • the deflector 6 promotes the evacuation of the water from the exhaust box 5 by its portion 61.
  • the profile 60 takes off the water nets of the hull in the exhaust zone and creates a ventilation zone behind the deflector 6.
  • the exhaust network 2 goes into submarine mode by opening or not a valve (not shown) disposed further upstream and the gases exit through the conduit 4 and the box 5 where the vacuum is sufficient to receive the exhaust.
  • the profile 61 directs the gases towards the rear of the ship 1 and the part 60 deflects the water streams so that the two streams are almost tangent when they come into contact with each other, which also favors flow and limit drag.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Exhaust Silencers (AREA)
  • Treating Waste Gases (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Incineration Of Waste (AREA)

Abstract

The device has an exhaust case (5) connected to a gas exhaust system via an exhaust pipe (4). The case is placed at the level of an exhaust outlet (7) that is situated on a hull of a ship and placed below water-line. The case is partially closed by a deflector (6) having width equal to two-third of the width of the outlet, and providing smooth profile to the hull.

Description

La présente invention concerne les navires et plus particulièrement l'échappement desdits navires.The present invention relates to ships and more particularly the exhaust of said vessels.

Il existe aujourd'hui deux types d'échappement: aérien et sous marin. Ces types peuvent être utilisés seuls ou en combinaison.There are two types of exhaust today: overhead and underwater. These types can be used alone or in combination.

L'échappement aérien présente l'inconvénient d'être bruyant, de générer des odeurs désagréables et de créer des panaches de fumée qui ne sont pas esthétiques et sont facilement repérables.The air exhaust has the disadvantage of being noisy, generating unpleasant odors and creating plumes of smoke that are not aesthetic and are easily spotted.

Les échappements sous marins ne fonctionnent qu'à haute vitesse (d'une manière générale à des vitesses supérieures à 9 noeuds), sont placés proche de la ligne de flottaison et ont une partie externe appelé déflecteur ou "cuillère" extérieure pour éviter l'entrée de l'eau dans l'échappement et protéger les moteurs de la contre pression exercée par l'eau. Ce système, bien que facile à réaliser, est très sensible aux mouvements du navire et de la houle, car il existe un risque d'introduction d'eau dans les moteurs. La position proche de la ligne de flottaison entraîne un risque de blocage par la glace ainsi qu'une détérioration du conduit extérieur par des objets flottants ou simplement le bord du quai. Les odeurs ne sont pas totalement supprimées du fait de la faible dispersion des gaz dans l'eau. De plus, le mouvement du navire et la houle peuvent dégager l'échappement de l'eau la fumée se retrouve alors directement dans l'air.Submarine exhausts operate only at high speed (generally at speeds greater than 9 knots), are placed close to the waterline and have an external part called the outer baffle or "spoon" to avoid the entering the water into the exhaust and protecting the engines from the back pressure exerted by the water. This system, although easy to perform, is very sensitive to ship and swell movements, as there is a risk of introducing water into the engines. The position close to the waterline causes a risk of blockage by the ice and a deterioration of the outer pipe by floating objects or just the edge of the dock. Odors are not completely suppressed due to the low dispersion of gases in the water. In addition, the movement of the ship and the swell can clear the exhaust of the water so the smoke is directly in the air.

L'objet de la présente invention est de proposer une coque de navire équipée d'un dispositif d'échappement sous marin à la fois simple, fonctionnant à faible vitesse et dégageant peu de fumées dans l'air à proximité du navire.The object of the present invention is to provide a hull of a ship equipped with a submarine escape device that is both simple, operating at low speed and releasing little smoke in the air near the ship.

Le dispositif d'échappement sous marin, qui équipe la coque de navire selon l'invention, est constitué d'une boite d'échappement connectée au réseau d'évacuation des gaz via un conduit d'échappement, ladite boite étant disposée au niveau d'une sortie d'échappement située sur cette coque, elle est équipée d'un déflecteur situé tangentiellement à ladite coque. Le déflecteur tangentiel donne un profil lisse à la coque du navire ce qui permet de passer en mode sous marin à des faibles vitesses et qui évite les risques de collision avec des objets flottants.The submarine escape device, which equips the hull of the ship according to the invention, consists of an exhaust box connected to the gas evacuation network via an exhaust duct, said box being arranged at the level of an exhaust outlet located on this hull, it is equipped with a deflector located tangentially to said hull. The tangential baffle gives a smooth profile to the hull of the ship which allows to go into submarine mode at low speeds and avoids the risk of collision with floating objects.

Il convient de noter qu'on connaît déjà, par le document EP-0921068 , un aileron stabilisateur disposé à la poupe d'un navire à moteur, cet aileron étant monté pivotant et faisant office de tubulure d'échappement des gaz émanant du moteur; cet échappement peut être sous-marin, comme cela est illustré à la figure 9.It should be noted that we already know, by the document EP-0921068 a stabilizing fin disposed at the stern of a motor ship, the fin being pivoted and acting as an exhaust pipe for the gases emanating from the engine; this exhaust can be submarine, as shown in Figure 9.

Un tel système est extrêmement complexe, car il met en oeuvre un organe mobile commandé par vérin. De plus, l'aileron fait saillie par rapport à la coque du navire, et risque d'entrer en collision avec des objets flottants.Such a system is extremely complex because it implements a movable member actuated cylinder. In addition, the fin protrudes from the hull of the ship, and may collide with floating objects.

Selon une caractéristique particulière, le déflecteur a la forme d'une cuillère inversée. A faible vitesse, la forme sensiblement bombée de l'extérieur de la cuillère accélère l'écoulement de l'intérieur de l'échappement et favorise l'évacuation de l'eau, tandis que la forme creuse de l'intérieur de la cuillère décolle les filets d'eau de la coque et crée une zone de ventilation à l'arrière du profil. En régime stabilisé, le profil garantit une zone de dépression suffisante à l'intérieur du conduit d'échappement pour l'évacuation des gaz.According to a particular characteristic, the deflector has the shape of an inverted spoon. At low speed, the substantially rounded shape of the outside of the spoon accelerates the flow of the interior of the exhaust and promotes the evacuation of water, while the hollow form of the inside of the spoon takes off. the water nets from the hull and creates a ventilation zone at the back of the profile. In steady state, the profile ensures a sufficient vacuum zone inside the exhaust duct for the evacuation of gases.

Selon une disposition avantageuse, le déflecteur a une largeur horizontale équivalente au 2/3 de la largeur horizontale de la sortie d'échappement. Cette taille est optimum pour faciliter l'évacuation des gaz sans entraîner d'entrée d'eau dans la boite d'échappement.According to an advantageous arrangement, the deflector has a horizontal width equivalent to 2/3 of the horizontal width of the exhaust outlet. This size is optimum to facilitate the evacuation of gases without causing water entry into the exhaust box.

Selon une disposition particulière, le conduit d'échappement est horizontal.According to a particular arrangement, the exhaust duct is horizontal.

Selon une autre caractéristique particulière, l'échappement est placé en dessous de la ligne de flottaison. La position très profonde de la sortie d'échappement permet de diminuer les bruits extérieurs, les rejets dans l'atmosphère, et de supprimer à la fois le risque de passage à l'air libre en cas de mouvements du navire ou de houle et le risque d'être pris dans les glaces.According to another particular characteristic, the escapement is placed below the waterline. The very deep position of the exhaust outlet makes it possible to reduce external noise and atmospheric emissions, and to eliminate both the risk of passage in the open air in case of movements of the ship or swell and the risk of being caught in the ice.

Selon une disposition particulière, l'échappement est situé à plus de 50cm de la ligne de flottaison.According to a particular provision, the exhaust is located more than 50cm from the waterline.

Selon une autre caractéristique, le conduit d'échappement fait un angle de 30 à 40° par rapport à la coque du navire. Cette inclinaison horizontale du conduit d'échappement par rapport au déflecteur permet une optimisation des écoulements.According to another characteristic, the exhaust duct is at an angle of 30 to 40 ° with respect to the hull of the ship. This horizontal inclination of the exhaust duct relative to the deflector allows an optimization of the flows.

L'invention sera mieux comprise à la lecture de la description qui va suivre donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels:

  • la figure 1 est une vue en coupe de profil du navire,
  • la figure 2 est une vue de dessus de l'échappement selon l'invention,
  • les figures 3 et 4 sont des vues de dessus de l'échappement fermé et ouvert.
The invention will be better understood on reading the following description given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a profile sectional view of the ship,
  • the figure 2 is a top view of the exhaust according to the invention,
  • the Figures 3 and 4 are top views of the closed and open exhaust.

Le navire 1 possède un échappement 2 disposé sous le niveau de la ligne de flottaison 3 à une certaine distance de ladite surface (cf. figure 1).The ship 1 has an escapement 2 disposed below the level of the water line 3 at a distance from said surface (cf. figure 1 ).

L'échappement 2 comporte un conduit d'échappement 4 et connectée au réseau d'échappement 8 des gaz et une boite 5 disposée à l'intérieur au niveau de la sortie d'échappement 7 et ne dépassant pas de la coque 10 du navire 1 (cf. figure 2). Le conduit 4 et la boite 5 font un angle α avec la coque 10. L'angle α est mesuré à partir de la partie avant 10a de la coque 10 et vaut entre 30 et 40°.The exhaust 2 comprises an exhaust pipe 4 and connected to the exhaust network 8 of the gases and a box 5 disposed inside at the exhaust outlet 7 and not extending beyond the hull 10 of the vessel 1 (cf. figure 2 ). The duct 4 and the box 5 make an angle α with the shell 10. The angle α is measured from the front portion 10a of the shell 10 and is between 30 and 40 °.

Comme visible à la figure 2, la boite 5 est partiellement fermée par un déflecteur 6 fixé sur le coté de la boite 5 au niveau de la partie avant 10a. Le déflecteur 6 est orienté vers l'avant du navire 1 de telle façon que lors du déplacement du navire 1 l'entrée de l'eau soit minimale.As visible at figure 2 , the box 5 is partially closed by a deflector 6 fixed on the side of the box 5 at the front portion 10a. The deflector 6 is oriented towards the front of the ship 1 so that during the displacement of the vessel 1 the entry of the water is minimal.

Le déflecteur 6 a la forme d'une cuillère dont la partie creuse 60 est dans le prolongement de la partie 10a de la coque 10 et dirigée vers l'extérieur du navire 1. La partie bombée 61 est placée à l'intérieur de la coque 10. Les deux faces 60 et 61 du déflecteur 6 convergent vers l'arrière du navire 1 de telle façon que la face avant 62 du déflecteur 6 soit plus large que la partie arrière 63.The deflector 6 has the shape of a spoon whose hollow portion 60 is in the extension of the portion 10a of the hull 10 and directed towards the outside of the ship 1. The curved portion 61 is placed inside the hull 10. The two faces 60 and 61 of the deflector 6 converge towards the rear of the ship 1 so that the front face 62 of the deflector 6 is wider than the rear portion 63.

Nous allons maintenant décrire le fonctionnement du dispositif grâce aux figure 3 et 4.We will now describe the operation of the device through figure 3 and 4 .

Comme on la voit figure 3, si F est le sens de déplacement de l'eau par rapport à la coque 10, en régime transitoire soit quand le navire 1 prend de la vitesse et tant que celle-ci reste inférieur à 5 noeuds, la boite 5 est remplie d'eau, le réseau d'échappement 8 des gaz étant alors en mode aérien. Le déflecteur 6 favorise l'évacuation de l'eau de la boite d'échappement 5 par sa partie 61. Le profil 60 décolle les filets d'eau de la coque dans la zone de l'échappement et crée une zone de ventilation derrière le déflecteur 6.As we see figure 3 if F is the direction of displacement of the water with respect to the hull 10, under transient conditions when the ship 1 is gaining speed and as long as the latter remains below 5 knots, the box 5 is filled with water, the exhaust network 8 gases being then in aerial mode. The deflector 6 promotes the evacuation of the water from the exhaust box 5 by its portion 61. The profile 60 takes off the water nets of the hull in the exhaust zone and creates a ventilation zone behind the deflector 6.

Une fois que la vitesse atteint les 5 noeuds, le réseau d'échappement 2 passe en mode sous marin par ouverture ou non d'une vanne (non représentée) disposée plus en amont et les gaz sortent par le conduit 4 et la boite 5 où la dépression est suffisante pour recevoir les gaz d'échappement. Le profil 61 dirige les gaz vers l'arrière du navire 1 et la partie 60 dévie les filets d'eau de telle façon que les deux flux sont quasiment tangents quand ils entrent en contact l'un avec l'autre, ce qui favorise également l'écoulement et limite la traînée.Once the speed reaches 5 knots, the exhaust network 2 goes into submarine mode by opening or not a valve (not shown) disposed further upstream and the gases exit through the conduit 4 and the box 5 where the vacuum is sufficient to receive the exhaust. The profile 61 directs the gases towards the rear of the ship 1 and the part 60 deflects the water streams so that the two streams are almost tangent when they come into contact with each other, which also favors flow and limit drag.

Claims (7)

  1. A ship hull provides with an underwater exhaust device (2) constituted by an exhaust box (5) connected to the exhaust gas network (8) via an exhaust pipe (4), said box (5) being disposed at an exhaust outlet (7) situated on said hull (10), characterized in that the exhaust box (5) is equipped with a deflector (6) situated tangentially to said hull (10).
  2. A ship hull according to claim 1, characterized in that the deflector (6) is in the shape of an upside-down scoop.
  3. A ship hull according to any preceding claim, characterized in that the deflector (6) has a horizontal width equivalent to two-thirds of the horizontal width of the exhaust outlet (7).
  4. A ship hull according to any preceding claim, characterized in that the exhaust pipe (4) is horizontal.
  5. A ship hull according to any preceding claim, characterized in that the exhaust outlet (7) is placed below the waterline (3).
  6. A ship hull according to the preceding claim, characterized in that the exhaust outlet (7) is situated more than 50 centimeters (cm) below the water line (3).
  7. A ship hull according to any preceding claim, characterized in that the exhaust (2) forms an angle of in the range 30° to 40° relative to the hull (10) of the ship (1).
EP05300083A 2004-02-19 2005-02-02 Underwater exhaust arrangement Expired - Lifetime EP1566333B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0450305 2004-02-19
FR0450305A FR2866625B1 (en) 2004-02-19 2004-02-19 UNDERWATER EXHAUST DEVICE

Publications (2)

Publication Number Publication Date
EP1566333A1 EP1566333A1 (en) 2005-08-24
EP1566333B1 true EP1566333B1 (en) 2008-07-09

Family

ID=34708048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05300083A Expired - Lifetime EP1566333B1 (en) 2004-02-19 2005-02-02 Underwater exhaust arrangement

Country Status (7)

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EP (1) EP1566333B1 (en)
AT (1) ATE400496T1 (en)
AU (1) AU2005200630B2 (en)
DE (1) DE602005007946D1 (en)
DK (1) DK1566333T3 (en)
ES (1) ES2309689T3 (en)
FR (1) FR2866625B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007020869B3 (en) 2007-05-04 2008-04-30 Blohm + Voss Gmbh Device for ships, has openings for deriving gaseous and liquid medium, particularly exhaust gases, in underwater area of ship wall of hull, over suctioning effect produced by outer current
CN105438428B (en) * 2015-01-16 2018-06-22 刘广 Ventilation pipeloop

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556314A (en) * 1994-03-08 1996-09-17 Sanshin Kogyo Kabushuki Kaisha Exhaust system for watercraft
US5591058A (en) * 1995-08-18 1997-01-07 Schriever; Frederick G. Exhaust accessory for boats
DE19753926C1 (en) * 1997-12-05 1999-05-12 Peter Mueller Trim flap for marine vessel

Also Published As

Publication number Publication date
DE602005007946D1 (en) 2008-08-21
EP1566333A1 (en) 2005-08-24
FR2866625B1 (en) 2006-04-28
FR2866625A1 (en) 2005-08-26
AU2005200630A1 (en) 2005-09-08
ATE400496T1 (en) 2008-07-15
AU2005200630B2 (en) 2010-07-08
DK1566333T3 (en) 2008-11-17
ES2309689T3 (en) 2008-12-16

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