WO2011121316A4 - Improvements in or relating to marine vessels - Google Patents

Improvements in or relating to marine vessels Download PDF

Info

Publication number
WO2011121316A4
WO2011121316A4 PCT/GB2011/000512 GB2011000512W WO2011121316A4 WO 2011121316 A4 WO2011121316 A4 WO 2011121316A4 GB 2011000512 W GB2011000512 W GB 2011000512W WO 2011121316 A4 WO2011121316 A4 WO 2011121316A4
Authority
WO
WIPO (PCT)
Prior art keywords
hull
stern
flap
baffles
transom
Prior art date
Application number
PCT/GB2011/000512
Other languages
French (fr)
Other versions
WO2011121316A3 (en
WO2011121316A2 (en
Inventor
David Maclean
T. Dinham-Peren
Original Assignee
Marine One Stop Technologies 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
Priority claimed from GB1005588.7A external-priority patent/GB2479204B/en
Priority claimed from GBGB1005688.5A external-priority patent/GB201005688D0/en
Application filed by Marine One Stop Technologies Ltd filed Critical Marine One Stop Technologies Ltd
Publication of WO2011121316A2 publication Critical patent/WO2011121316A2/en
Publication of WO2011121316A3 publication Critical patent/WO2011121316A3/en
Publication of WO2011121316A4 publication Critical patent/WO2011121316A4/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • 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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The present invention relates to the hydrodynamics of marine vessels, more particularly to adjuncts, appendages and auxiliary devices for affecting same. More efficient hull designs will have a fully faired hull form which includes a tapering of the hull around the stern at and below the waterline. The hydrodynamic flow will naturally become "turbulent" part way along the hull, and towards the stern of the boat will develop significant eddies which will add to the flow (viscous) drag of the hull. The hull will also create waves as it moves through the water and these waves become bigger as the speed increases and they generate wave induced drag on the hull. The present invention seeks to provide an improved hydrodynamic structure for a commercial vessel. The present invention also seeks to provide a hull design that can reduce the shaft power required to propel a ship, thereby reducing the engine fuel consumption. The invention provides a displacement vessel having a transom and a stern flap assembly which includes generally vertically oriented baffles.

Claims

AMENDED CLAIMS received by the International Bureau on 10 September 2012
1. A displacement vessel having a transom and a stern flap assembly wherein the stern flap is contiguous with the surface of the hull, the stern flap assembly including vertically oriented baffles.
2. A displacement vessel according to claim 1, wherein the baffles are configured as extensions of the flap and extend along the sides of the hull.
3 A displacement vessel according to claim 1, wherein the stern baffles are upwardly directed across the width of the transom.
4. A displacement vessel according to claim 3, wherein the stern flap has a span which is less than the width of the transom and the stern baffles rise upwardly at the edges of the flap.
5. A displacement vessel according to any one of claims 1 - 4, wherein the angle of the flap is adjustable with respect to the buttock run of the hull.
6. A displacement vessel according to any one of claims 1 - 5 wherein one or ore of the stern flap and baffle comprise integral features of the hull of the vessel.
7. A displacement vessel according to any one of claims 1 - 5 wherein the stern flap and baffle comprise elements separate from the hull of the vessel.
8. A displacement vessel according to any one of claims 1 - 6, wherein the baffles are configured as unitary with the stern flap.
9. A displacement vessel according to any one of claims 1 - 6, wherein the stern flap is contiguous and faired with the surface of the hull.
16
10. A stern flap assembly for a displacement vessel having a transom, wherein the stern flap assembly includes vertically oriented baffles.
11. A stern flap assembly according to claim 10, wherein the baffles are configured as extensions of the flap and extend along the sides of the hull.
12. A stern flap assembly according to claim 10, wherein the stern baffles are upwardly directed across the width of the transom.
13. A stern flap assembly according to claim 12, wherein the stern flap has a span which is less than the width of the transom of the vessel and the stern baffles rise upwardly at the edges of the flap.
14. A stern flap assembly according to any one of claims 10 - 13, wherein the angle of the flap is adjustable with respect to the buttock run of the hull.
15. A stern flap assembly according to any one of claims 10 - 14, wherein the baffles are configured as being unitary with the stern flap.
16. A stern flap assembly according to any one of claims 10 - 15, wherein the stern flap is contiguous and faired with the surface of the hull.
17
PCT/GB2011/000512 2010-04-01 2011-04-01 Improvements in or relating to marine vessels WO2011121316A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1005588.7 2010-04-01
GB1005588.7A GB2479204B (en) 2010-04-01 2010-04-01 A hydrodynamic stern flap assembly for a displacement hull
GBGB1005688.5A GB201005688D0 (en) 2010-04-06 2010-04-06 Improvements in or relating to marine vessels
GB1005688.5 2010-04-06

Publications (3)

Publication Number Publication Date
WO2011121316A2 WO2011121316A2 (en) 2011-10-06
WO2011121316A3 WO2011121316A3 (en) 2012-09-27
WO2011121316A4 true WO2011121316A4 (en) 2012-11-08

Family

ID=44310231

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2011/000512 WO2011121316A2 (en) 2010-04-01 2011-04-01 Improvements in or relating to marine vessels

Country Status (1)

Country Link
WO (1) WO2011121316A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115871864B (en) * 2022-12-07 2024-04-19 华南理工大学 Stern drag reduction and pitching reduction device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6038995A (en) 1997-10-10 2000-03-21 The United States Of America As Represented By The Secretary Of The Navy Combined wedge-flap for improved ship powering
US7299763B2 (en) * 2004-12-22 2007-11-27 Navatek, Ltd. Hull with propulsion tunnel and leading edge interceptor
NL2000109C2 (en) * 2006-06-19 2007-12-20 Oossanen & Associates B V Van Vessel for operating on body of water, has foil including leading edge that is tilted at downward angle relative to horizontal, where leading edge is positioned less than or equal to specific chord length

Also Published As

Publication number Publication date
WO2011121316A3 (en) 2012-09-27
WO2011121316A2 (en) 2011-10-06

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