US20100170427A1 - Device for reducing the entry of fluid into a tunnel - Google Patents

Device for reducing the entry of fluid into a tunnel Download PDF

Info

Publication number
US20100170427A1
US20100170427A1 US12/664,104 US66410408A US2010170427A1 US 20100170427 A1 US20100170427 A1 US 20100170427A1 US 66410408 A US66410408 A US 66410408A US 2010170427 A1 US2010170427 A1 US 2010170427A1
Authority
US
United States
Prior art keywords
vessel
hull
deflector
orifice
cavity
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.)
Abandoned
Application number
US12/664,104
Other languages
English (en)
Inventor
Yvan Brulhart
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.)
DRS Drag Reduction Systems SA
Magising Pte Ltd
Original Assignee
DRS Drag Reduction Systems SA
Magising Pte 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 DRS Drag Reduction Systems SA, Magising Pte Ltd filed Critical DRS Drag Reduction Systems SA
Assigned to MAGISING PTE. LTD., DRS DRAG REDUCTION SYSTEMS SA reassignment MAGISING PTE. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRULHART, YVAN
Publication of US20100170427A1 publication Critical patent/US20100170427A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/46—Steering or dynamic anchoring by jets or by rudders carrying jets

Definitions

  • the present invention relates to a device greatly reducing, or even avoiding, the entry of a fluid, generally a liquid, into a tunnel.
  • the invention relates to a device enabling—during the normal forwards movement of a vessel—the entry of the water into the tunnel of a bow thruster of this vessel to be greatly reduced or avoided.
  • the presence of a housing, of a recess and, naturally, of a bow thruster tunnel greatly disrupts the normal movement of boats and ships equipped therewith, because this interruption in the hull of the vessel causes eddies, turbulence and a significant drag, reducing the speed of movement of the vessel and absorbing a large amount of the propulsion power.
  • the object of the present invention is to propose a device for controlling the flow of fluid passing in front of one or more orifices in the hull of a vessel, in particular at the orifices giving access to the transverse tunnel enclosing the bow thruster/thrusters, in order to reduce the volume of fluid which flows along the hull of the vessel during its normal movement entering or leaving this tunnel in order to greatly reduce or avoid any eddying, drag or turbulence phenomena, which is simple, strong and requires only little or no maintenance.
  • An object of the present invention is the production of such a device for controlling the flow of fluid passing in front of an orifice or cavity in the hull of a vessel.
  • the object of the present invention is a device for controlling the fluid passing in front of the orifices in the hull of a vessel, in particular those giving access to the transverse tunnel enclosing the bow thruster/thrusters, tending to obviate the disadvantages of the above-mentioned existing devices and permitting the object stated above to be achieved.
  • This device for controlling the flow of fluid passing in front of an orifice or cavity in the hull of a vessel is characterised by the features listed in claim 1 .
  • FIG. 1 is a schematic vertical partial cross-sectional view perpendicular to the longitudinal axis of the vessel, passing through the axis of the bow thruster tunnel.
  • FIG. 2 is a partial view of the hull of the vessel in line with the arrow A of FIG. 1 .
  • FIG. 3 is a cross-section along the line III-III of FIG. 2 .
  • FIG. 4 is a cross-sectional detail on a larger scale showing the device.
  • FIG. 5 illustrates on a larger scale a transverse cross-sectional view of the shapes forming a deflector.
  • the attached drawing shows very schematically the hull 1 of a vessel through which a bow tunnel 2 passes in the transverse direction, in which tunnel one or more bow thrusters 3 are mounted. At its ends this bow tunnel 2 has orifices 4 passing through the hull 1 of the vessel and issuing entirely into the water.
  • the cross-section of this bow tunnel 2 is generally circular and its ends can be flared.
  • the bow tunnel 2 is filled with the fluid surrounding the hull 1 of the vessel.
  • the bow thruster 3 When the vessel manoeuvres in order to dock, for example, or in order to leave its position at the quay, the bow thruster 3 is started up, which causes a displacement in the fluid inside the bow tunnel transverse to the longitudinal axis of the vessel, which makes it possible to move this vessel in order to bring it closer to, or move it further away from, the mooring quay.
  • the object of the device in accordance with the invention is to control the flow of fluid passing in front of the orifices 4 of the bow tunnel 2 in order to reduce or avoid entry of the fluid into this tunnel 2 and reduce or eliminate any turbulence and drag owing to the flow of the fluid in front of these orifices 4 .
  • This device for controlling the flow of the fluid in front of the orifices of the bow tunnel 4 of the hull 1 of a vessel has at least one deflector 5 rigidly fixed to the hull 1 of the vessel upstream of the orifice 4 and extending over a distance greater than or at least equal to the diameter of this orifice 4 .
  • This deflector 5 has, in cross-section, a planar inner face 6 disposed facing the hull 1 of the vessel and a convex outer face 7 .
  • the thickness of the deflectors increases greatly in the upstream part 8 to then decrease slowly in the direction of the downstream part and to terminate in a strongly tapered manner forming a downstream edge 9 .
  • This deflector 5 is rigidly fixed to the hull 1 of the vessel with the aid of supports 10 welded, bolted or fixed in any other manner to the hull 1 of the vessel.
  • the device preferably has two deflectors 5 disposed on either side of the orifice 4 of the bow tunnel 2 .
  • the distance L separating the downstream edge 9 of the upstream deflector 5 from the upstream edge of the downstream deflector 5 a is substantially equal to, slightly less or greater than, the diameter of the orifice 4 of the bow tunnel 2 .
  • the inner planar surface 6 of the deflectors 5 and 5 a is substantially parallel to the hull 1 of the vessel.
  • the inner face 6 of the upstream deflector 5 forms a slight angle with the surface of the hull 1 of the vessel so that its downstream edge 9 is further away from this hull than its front edge is.
  • the front edge of the downstream deflector 5 a is closer to the hull 1 of the vessel than the downstream edge 9 of this downstream deflector 5 a is.
  • the downstream deflector 5 a is omitted.
  • the length 1 of the deflector/deflectors 5 would be of the order of 1.1 m, its depth P of the order of 15 to 40 cm and its thickness e of the order of 15 to 30 mm.
  • the depth P of the upstream deflector is preferably greater than that of the downstream deflector.
  • the flow of fluid between the deflector/deflectors 5 and the hull 1 of the vessel is controlled and modified. It becomes uniform and controlled and forms a liquid wall in front of the orifice 4 of the bow tunnel, preventing the fluid from entering it or at least greatly reducing the entrance of fluid into the said orifice. This makes it possible to reduce or eliminate turbulence in the fluid at this location and to reduce the drag of the vessel very substantially.
  • the device of the invention is simple, inexpensive, fixed to the hull of the vessel and requires only a little maintenance while making it possible to avoid drag and turbulence in the fluid owing to the presence of the bow tunnel orifices and thus to reduce the resistance to the forward movement of the vessel.
  • the device described can be used to control the flow of fluid passing in front of any type of orifice or cavity formed in the hull of a vessel.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Paper (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Pipe Accessories (AREA)
  • Air-Flow Control Members (AREA)
  • Vehicle Body Suspensions (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pipeline Systems (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Gas Separation By Absorption (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
US12/664,104 2007-06-13 2008-05-15 Device for reducing the entry of fluid into a tunnel Abandoned US20100170427A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00937/07A CH702119B1 (fr) 2007-06-13 2007-06-13 Dispositif de contrôle du flux d'un fluide dans un canal.
CH00937/07 2007-06-13
PCT/IB2008/001210 WO2008152460A1 (fr) 2007-06-13 2008-05-15 Dispositif réduisant la pénétration d'un fluide dans un canal

Publications (1)

Publication Number Publication Date
US20100170427A1 true US20100170427A1 (en) 2010-07-08

Family

ID=39712239

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/664,104 Abandoned US20100170427A1 (en) 2007-06-13 2008-05-15 Device for reducing the entry of fluid into a tunnel

Country Status (11)

Country Link
US (1) US20100170427A1 (zh)
EP (1) EP2155547B1 (zh)
KR (1) KR20100020471A (zh)
CN (1) CN101715410A (zh)
AT (1) ATE499284T1 (zh)
BR (1) BRPI0812472A2 (zh)
CA (1) CA2690729A1 (zh)
CH (1) CH702119B1 (zh)
DE (1) DE602008005139D1 (zh)
RU (1) RU2010100909A (zh)
WO (1) WO2008152460A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110061584A1 (en) * 2009-09-16 2011-03-17 Robert Kuklinski Water Entry System
JP2015147533A (ja) * 2014-02-07 2015-08-20 三菱重工業株式会社 船舶のスラスター
RU2661271C2 (ru) * 2017-08-28 2018-07-13 Андрей Витальевич Швецов Движительно-рулевой комплекс судна

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101992846B (zh) * 2010-11-11 2013-06-19 南京恒兴达机电设备制造有限公司 侧推器减阻降噪装置
CN102381439B (zh) * 2011-05-30 2014-04-30 湖南科技大学 一种船体槽道口封盖装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2356301A (en) * 1942-09-18 1944-08-22 Brase George Apparatus for propelling and steering boats
US5098322A (en) * 1990-07-23 1992-03-24 Outboard Marine Corporation Marine propulsion device with self assembling coolant water inlet screens
US5215487A (en) * 1992-01-21 1993-06-01 Outboard Marine Corporation Marine propulsion device water inlet screen
US5344345A (en) * 1992-06-03 1994-09-06 Idc Corporation Water vessel propulsion apparatus
US6286447B1 (en) * 1999-08-20 2001-09-11 The United States Of America As Represented By The Secretary Of The Navy Baffle system for mitigation of thruster wake deficit
US6701862B2 (en) * 1999-11-24 2004-03-09 Terry B. Hilleman Bow mounted system and method for jet-propelling a submarine or torpedo through water

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182550B (de) * 1962-10-10 1964-11-26 Friedrich Wilhelm Pleuger Einrichtung zum Schutz eines Bugstrahlruders vor Vereisung
DE2160616A1 (de) * 1971-12-07 1973-06-14 Walter Banz Zusaetzlicher schiffsantrieb
DE2746853C2 (de) * 1977-10-19 1979-10-25 Jastram-Werke Gmbh Kg, 2050 Hamburg Schiff mit Querstrahlsteuer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2356301A (en) * 1942-09-18 1944-08-22 Brase George Apparatus for propelling and steering boats
US5098322A (en) * 1990-07-23 1992-03-24 Outboard Marine Corporation Marine propulsion device with self assembling coolant water inlet screens
US5215487A (en) * 1992-01-21 1993-06-01 Outboard Marine Corporation Marine propulsion device water inlet screen
US5344345A (en) * 1992-06-03 1994-09-06 Idc Corporation Water vessel propulsion apparatus
US6286447B1 (en) * 1999-08-20 2001-09-11 The United States Of America As Represented By The Secretary Of The Navy Baffle system for mitigation of thruster wake deficit
US6701862B2 (en) * 1999-11-24 2004-03-09 Terry B. Hilleman Bow mounted system and method for jet-propelling a submarine or torpedo through water

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110061584A1 (en) * 2009-09-16 2011-03-17 Robert Kuklinski Water Entry System
US8127705B2 (en) * 2009-09-16 2012-03-06 The United States Of America As Represented By The Secretary Of The Navy Water entry system
JP2015147533A (ja) * 2014-02-07 2015-08-20 三菱重工業株式会社 船舶のスラスター
RU2661271C2 (ru) * 2017-08-28 2018-07-13 Андрей Витальевич Швецов Движительно-рулевой комплекс судна

Also Published As

Publication number Publication date
BRPI0812472A2 (pt) 2014-12-02
EP2155547B1 (fr) 2011-02-23
DE602008005139D1 (de) 2011-04-07
KR20100020471A (ko) 2010-02-22
CN101715410A (zh) 2010-05-26
WO2008152460A8 (fr) 2009-02-12
CH702119B1 (fr) 2011-05-13
EP2155547A1 (fr) 2010-02-24
RU2010100909A (ru) 2011-07-20
ATE499284T1 (de) 2011-03-15
CA2690729A1 (fr) 2008-12-18
WO2008152460A1 (fr) 2008-12-18

Similar Documents

Publication Publication Date Title
KR101348081B1 (ko) 추진기 주변에 계단형식을 갖춘 선미형상을 한 에어 캐비티 및 공기윤활 방식 선박
US20100170427A1 (en) Device for reducing the entry of fluid into a tunnel
US8584609B2 (en) Tapered tunnel for tunnel thrusters
KR101733873B1 (ko) 공기분출 슬릿의 개폐구조를 갖는 선저 돌출형 공기 윤활 장치
US20100323566A1 (en) Kort nozzle
JP2008018927A (ja) 船舶推進システム
KR101464187B1 (ko) 선박에 구비되는 제어핀 및 그 제어핀을 구비하는 선박
KR20190079552A (ko) 최소 선수 파도 시스템
KR20140019704A (ko) 트윈 스케그 선박
CN210364333U (zh) 喷射型漂移艇
US10730588B2 (en) Ship hull assembly for reducing water resistance and improving maneuverability
KR20080080070A (ko) 선박
KR20140048287A (ko) 빙해에서 운항하는 해양선박
Yoo et al. An experimental study on the maneuvering characteristics of a twin propeller/twin rudder ship during berthing and unberthing
JP2023067297A (ja) 航走体の推進力発生システム、航走体及び航走体の抵抗低減方法
US7144282B1 (en) Contoured rudder maneuvering of waterjet propelled sea craft
KR20090117486A (ko) 스크류 프로펠러로 추진되는 선박
US1157423A (en) Boat.
KR20090123459A (ko) 선박용 추진 시스템
KR20070119806A (ko) 스러스터의 와류저감장치
JP7169766B2 (ja) スケグ船
JP6504802B2 (ja) 造波抵抗低減船舶及び造波抵抗低減船舶の設計方法
EP3263438B1 (en) System and method for reducing drag of vessel
KR20120126234A (ko) 후방향으로 기울어진 턴넬노즐을 구비한 터널형 스러스터
KR20230017270A (ko) 수상 이동체에 필요한 추진 동력을 저감시키는 장치

Legal Events

Date Code Title Description
AS Assignment

Owner name: DRS DRAG REDUCTION SYSTEMS SA, MAURITIUS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BRULHART, YVAN;REEL/FRAME:024167/0828

Effective date: 20091126

Owner name: MAGISING PTE. LTD., SINGAPORE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BRULHART, YVAN;REEL/FRAME:024167/0828

Effective date: 20091126

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION