EP0470339A1 - Leitflächensystem - Google Patents

Leitflächensystem Download PDF

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Publication number
EP0470339A1
EP0470339A1 EP91108534A EP91108534A EP0470339A1 EP 0470339 A1 EP0470339 A1 EP 0470339A1 EP 91108534 A EP91108534 A EP 91108534A EP 91108534 A EP91108534 A EP 91108534A EP 0470339 A1 EP0470339 A1 EP 0470339A1
Authority
EP
European Patent Office
Prior art keywords
ship
guide
outer skin
surface system
guide surface
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.)
Withdrawn
Application number
EP91108534A
Other languages
German (de)
English (en)
French (fr)
Inventor
Herbert Prof. Dr.-Ing. Schneekluth
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0470339A1 publication Critical patent/EP0470339A1/de
Withdrawn legal-status Critical Current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
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens

Definitions

  • the invention relates to a guide surface system at the stern of screw-in ships, consisting of flow elements, an annular nozzle being arranged in a ship-fixed manner at a horizontal distance up to a propeller diameter in front of the propeller, which is optionally formed from half-shells and which each have one with the ship's outer skin or with the midships plane form a closed ring.
  • the water inflow for the ring nozzles upstream of the ship's propeller largely depends on the shape of the ship.
  • the current mostly converges towards the midships level and runs slightly backwards.
  • the axial direction of the ring nozzles is oriented approximately in this direction. In many cases, this flow is overlaid by another flow that only occurs on the outer skin in the boundary layer area. This current is directed obliquely downwards in the ship's fixed coordinate system.
  • the flow angle give the horizontal can be 60 ° and more. This downward flow can usually only be found in a thin layer of water near the outer skin, for example in the boundary layer area in the rear quarter of the ship. At a greater distance from the outer skin, the flow is more horizontal.
  • the downflow effect depends on the pressure distribution and on the vortices that separate at the rear.
  • a breakdown of this flow means an energy loss, which worsens the efficiency of the propulsion system.
  • the effort for the construction of twisted ring nozzles would be relatively large and such an arrangement is also very cumbersome for necessary model tests.
  • the object of the invention is to improve the generic flow guide surface in combination with flow deflection devices.
  • This object is achieved according to the invention in that, as a further flow element in front of the ring nozzle at a distance up to a propeller diameter on the ship's outer skin, at least one curved guide vane with an inlet tangent for the entry of a local boundary layer flow as a downflow and with an outlet tangent which is essentially orthogonal to the entry plane the ring nozzle is directed.
  • the arrangement according to the invention essentially achieves a horizontal flow against the ring nozzle in the area close to the outer skin and the flow hardly has any falling component. This prevents the flow in the boundary layer area on the outside of the profile of the ring nozzle from breaking off. The vane also creates additional propulsion.
  • a special embodiment consists in the combination of an annular nozzle with at least one associated guide vane, the center of gravity of a cross-sectional area enclosed by the annular nozzle being above the propeller axis.
  • each guide vane is designed as a triangular element in the form of a cutout of the outer surface of a cylinder body with a circular or elliptical cross section.
  • the profile angles of attack from the hull going outwards are desirably flatter.
  • a tip of the triangular element is directed forward as a guide vane, while a catheter of the triangular element is arranged on the ship's outer skin.
  • the triangular element as a guide vane is formed by an approximately right-angled triangle, of which the longer catheter lies against the ship's outer skin and a tip is directed forward at a smaller angle. The strongest flow deflection takes place on the outer skin, which decreases towards the outside.
  • guide vanes are connected upstream of a lower region of the ring nozzle. Guide vanes are particularly effective when placed in front of the nozzle profiles. The guide vanes in front of the lower nozzle inlet have the greatest effect.
  • a favorable design is that several guide vanes are arranged approximately in parallel.
  • the guide vanes are designed as profile bodies and have a rounded leading edge.
  • the guide vanes run as an ice deflector with an outer tip of the triangle into the inner wall of the ring nozzle. This provides additional support.
  • annular nozzle 8 is arranged, to which upstream curved guide vanes 9 are assigned.
  • a base line 1 and a lateral ship contour 2 and a construction water line 7 are designated.
  • rudder 5 with rudder axis 6 and a propeller 3 with propeller axis 4 as well as a central aisle plane 22, a frame contour 23 and a propeller wing tip circle 24 are shown.
  • upstream guide vanes 9 By means of these upstream guide vanes 9, it is possible to prevent the flow and flow separations from being torn off and also to prevent the flow from tearing off at the underside of the profile of the ring nozzle 8.
  • annular nozzle 8 without associated guide vanes 9 is shown according to the prior art. Here occurs in the flow path 15, among others. a swirl zone 16 below the lower nozzle inlet of the ring nozzle 8 into the ship's outer skin.
  • a guide blade 9 is simultaneously arranged as an ice deflector.
  • a water line 18 of the ship shape is shown as a horizontal section through the hull at the level of the upper inflow nozzle inlet into the ship's outer skin and a water line 19 of the ship shape at the level of the inflow nozzle axis and a water line 20 of the ship shape at the level of the lower inflow nozzle inlet into the ship's outer skin.
  • the guide vanes 9 are connected to one another and to the ship's outer wall via profiled support elements 21.
  • the support elements act as stiffening to avoid natural vibrations and also as an end plate or winglet to reinforce the hydrodynamic advantage.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Hydraulic Turbines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Ship Loading And Unloading (AREA)
EP91108534A 1990-08-10 1991-06-18 Leitflächensystem Withdrawn EP0470339A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025339A DE4025339C2 (de) 1990-08-10 1990-08-10 Leitflächensystem
DE4025339 1990-08-10

Publications (1)

Publication Number Publication Date
EP0470339A1 true EP0470339A1 (de) 1992-02-12

Family

ID=6411980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108534A Withdrawn EP0470339A1 (de) 1990-08-10 1991-06-18 Leitflächensystem

Country Status (8)

Country Link
EP (1) EP0470339A1 (ja)
JP (1) JPH04230486A (ja)
KR (1) KR920004238A (ja)
CN (1) CN1058758A (ja)
DE (1) DE4025339C2 (ja)
PL (1) PL291369A1 (ja)
RU (1) RU2046054C1 (ja)
TR (1) TR25389A (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100809A3 (de) * 2008-03-10 2009-12-02 Becker Marine Systems GmbH & Co. KG Vorrichtung zur Verringerung des Antriebsleistungsbedarfes eines Schiffes
EP2298640A1 (en) * 2009-09-17 2011-03-23 Daewoo Shipbuilding&Marine Engineering Co., Ltd. Ducted pre-swirl stator assembly
CN102046461A (zh) * 2008-06-09 2011-05-04 联邦国有制企业圣彼得堡Malakhit机械制造海事局 海下交通工具的十字形尾部控制表面
EP2591994A1 (de) * 2011-11-11 2013-05-15 Becker Marine Systems GmbH & Co. KG Vorrichtung zur Verringerung des Antriebsleistungsbedarfs eines Wasserfahrzeuges
CN112109869A (zh) * 2019-11-14 2020-12-22 浙江大学 一种带c形导叶的全导管式双级吊舱推进器

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006347285A (ja) * 2005-06-14 2006-12-28 Ishikawajima Harima Heavy Ind Co Ltd 船舶の船尾部構造及びその設計方法
JP4939269B2 (ja) * 2007-03-28 2012-05-23 三井造船株式会社 船尾横長ダクト及び船舶
JP5095521B2 (ja) * 2008-06-25 2012-12-12 住友重機械マリンエンジニアリング株式会社 船体構造
EP2338783B1 (en) * 2008-10-20 2013-02-27 Mitsubishi Heavy Industries, Ltd. Twin skeg ship
DE202011000439U1 (de) * 2011-02-25 2012-08-21 Becker Marine Systems Gmbh & Co. Kg Vordüse für ein Antriebssystem eines Wasserfahrzeuges zur Verbesserung der Energieeffizienz
KR20150145337A (ko) 2014-06-18 2015-12-30 현대중공업 주식회사 선박용 추진장치
JP6418451B2 (ja) * 2015-03-31 2018-11-07 三井Ｅ＆Ｓ造船株式会社 船舶
CN107848614B (zh) 2015-08-31 2020-03-10 国立研究开发法人海上·港湾·航空技术研究所 具有船尾导管的船尾及船舶
CN105597543B (zh) * 2016-04-05 2019-02-05 成都美富特环保产业集团有限公司 一种用于水处理膜堆的间隔网结构
JP6748502B2 (ja) * 2016-07-25 2020-09-02 三菱重工業株式会社 船舶
JP6722340B1 (ja) * 2019-12-06 2020-07-15 川崎重工業株式会社 船尾構造

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1409346A (en) * 1972-07-12 1975-10-08 Liaaen As A M Propeller guard
DE3216578C1 (de) * 1982-05-04 1983-10-13 Herbert Prof. Dr.-Ing. 5100 Aachen Schneekluth Stroemungsleitflaeche am Heck von Einschraubenschiffen
DE3324753A1 (de) * 1983-07-06 1985-01-17 Hermann Dr.-Ing. 1000 Berlin Grothues-Spork Anordnung zum beeinflussen der propelleranstroemung
DE3620540A1 (de) * 1985-09-23 1987-04-02 Schiffbau Veb K Vorrichtung zur erhoehung des wirkungsgrades von schiffspropellern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1409346A (en) * 1972-07-12 1975-10-08 Liaaen As A M Propeller guard
DE3216578C1 (de) * 1982-05-04 1983-10-13 Herbert Prof. Dr.-Ing. 5100 Aachen Schneekluth Stroemungsleitflaeche am Heck von Einschraubenschiffen
DE3324753A1 (de) * 1983-07-06 1985-01-17 Hermann Dr.-Ing. 1000 Berlin Grothues-Spork Anordnung zum beeinflussen der propelleranstroemung
DE3620540A1 (de) * 1985-09-23 1987-04-02 Schiffbau Veb K Vorrichtung zur erhoehung des wirkungsgrades von schiffspropellern

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100809A3 (de) * 2008-03-10 2009-12-02 Becker Marine Systems GmbH & Co. KG Vorrichtung zur Verringerung des Antriebsleistungsbedarfes eines Schiffes
US8123578B2 (en) 2008-03-10 2012-02-28 Becker Marine Systems Gmbh & Co. Device for reducing the power demand for the propulsion of a ship
US8430703B2 (en) 2008-03-10 2013-04-30 Becker Marine Systems Gmbh & Co. Kg Device for reducing the drive power requirement of a ship
CN102046461A (zh) * 2008-06-09 2011-05-04 联邦国有制企业圣彼得堡Malakhit机械制造海事局 海下交通工具的十字形尾部控制表面
CN102046461B (zh) * 2008-06-09 2013-08-28 联邦国有制企业"圣彼得堡Malakhit机械制造海事局" 海下交通工具的十字形尾部控制表面
EP2298640A1 (en) * 2009-09-17 2011-03-23 Daewoo Shipbuilding&Marine Engineering Co., Ltd. Ducted pre-swirl stator assembly
EP2591994A1 (de) * 2011-11-11 2013-05-15 Becker Marine Systems GmbH & Co. KG Vorrichtung zur Verringerung des Antriebsleistungsbedarfs eines Wasserfahrzeuges
JP2013103717A (ja) * 2011-11-11 2013-05-30 Becker Marine Systems Gmbh & Co Kg 船舶の駆動力要件を低減するための装置
US8814496B2 (en) 2011-11-11 2014-08-26 Becker Marine Systems Gmbh & Co. Kg Device for reducing the drive power requirements of a watercraft
CN112109869A (zh) * 2019-11-14 2020-12-22 浙江大学 一种带c形导叶的全导管式双级吊舱推进器

Also Published As

Publication number Publication date
DE4025339A1 (de) 1992-02-13
TR25389A (tr) 1993-03-01
DE4025339C2 (de) 1999-07-08
JPH04230486A (ja) 1992-08-19
RU2046054C1 (ru) 1995-10-20
KR920004238A (ko) 1992-03-27
CN1058758A (zh) 1992-02-19
PL291369A1 (en) 1992-06-26

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