WO2015001315A3 - Cavitation generation - Google Patents

Cavitation generation Download PDF

Info

Publication number
WO2015001315A3
WO2015001315A3 PCT/GB2014/051950 GB2014051950W WO2015001315A3 WO 2015001315 A3 WO2015001315 A3 WO 2015001315A3 GB 2014051950 W GB2014051950 W GB 2014051950W WO 2015001315 A3 WO2015001315 A3 WO 2015001315A3
Authority
WO
WIPO (PCT)
Prior art keywords
cavitation generation
liquid
region
predetermined direction
cavitation
Prior art date
Application number
PCT/GB2014/051950
Other languages
French (fr)
Other versions
WO2015001315A2 (en
Inventor
Rade Vignjevic
Original Assignee
Cranfield University
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 GB201311813A external-priority patent/GB201311813D0/en
Priority claimed from GB201319908A external-priority patent/GB201319908D0/en
Application filed by Cranfield University filed Critical Cranfield University
Publication of WO2015001315A2 publication Critical patent/WO2015001315A2/en
Publication of WO2015001315A3 publication Critical patent/WO2015001315A3/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
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/24—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type
    • B63B1/248—Shape, hydrodynamic features, construction of the foil
    • 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
    • B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
    • B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
    • B63B2001/382—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes by making use of supercavitation, e.g. for underwater vehicles
    • 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
    • B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
    • B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
    • B63B2001/387—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes using means for producing a film of air or air bubbles over at least a significant portion of the hull surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/18—Propellers with means for diminishing cavitation, e.g. supercavitation
    • 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)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A surface (110) to be exposed to liquid flow in a predetermined direction (F) relative to the surface has a plurality of predetermined regions (120) spaced in the predetermined direction, the surface in each region having at least one discontinuity (200) configured to generate, in liquid in the vicinity of that region, a pressure sufficient to initiate cavitation in that liquid.
PCT/GB2014/051950 2013-07-02 2014-06-26 Cavitation generation WO2015001315A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1311813.8 2013-07-02
GB201311813A GB201311813D0 (en) 2013-07-02 2013-07-02 Cavitation generation
GB201319908A GB201319908D0 (en) 2013-11-12 2013-11-12 Cavitation Generation
GB1319908.8 2013-11-12

Publications (2)

Publication Number Publication Date
WO2015001315A2 WO2015001315A2 (en) 2015-01-08
WO2015001315A3 true WO2015001315A3 (en) 2015-09-11

Family

ID=51257523

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2014/051950 WO2015001315A2 (en) 2013-07-02 2014-06-26 Cavitation generation

Country Status (1)

Country Link
WO (1) WO2015001315A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112320882B (en) * 2020-10-30 2022-03-25 深圳先进技术研究院 Sewage treatment device
CN115017609B (en) * 2022-05-23 2023-05-26 中国船舶科学研究中心 Method for evaluating effective attack angle of cavitation part of real-scale ship appendage

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044432A (en) * 1959-12-02 1962-07-17 Grumman Aircraft Engineering C Method of operating and apparatus for watercraft
US3498247A (en) * 1967-11-29 1970-03-03 Us Navy Supercavitating hydrofoil
WO1999057007A1 (en) * 1998-05-06 1999-11-11 Elms Australia Pty. Ltd. Improved hydrofoil device
US6167829B1 (en) * 1997-10-09 2001-01-02 Thomas G. Lang Low-drag, high-speed ship
WO2001087682A1 (en) * 2000-05-18 2001-11-22 Wingship Limited Wing in ground effect vehicle with endplates
JP2004352024A (en) * 2003-05-28 2004-12-16 Tech Res & Dev Inst Of Japan Def Agency Multi-layer structure material for hull and method for simultaneously reducing fluid resistance and self-radiation noise level of sailing body
US20050076819A1 (en) * 2002-10-10 2005-04-14 Hilleman Terry Bruceman Apparatus and method for reducing hydrofoil cavitation
WO2008069948A1 (en) * 2006-12-01 2008-06-12 Searete Llc System and method for changing the convective heat transfer of a surface
US7517263B1 (en) * 2007-09-05 2009-04-14 The United States Of America As Represented By The Secretary Of The Navy Advanced blade sections for high speed propellers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894627A (en) 1957-04-30 1962-04-26 Peter Willems Method and apparatus for treating materials and/or material mixtures continuously or in charges
US6684801B1 (en) 2002-10-03 2004-02-03 The United States Of America As Represented By The Secretary Of The Navy Supercavitation ventilation control system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044432A (en) * 1959-12-02 1962-07-17 Grumman Aircraft Engineering C Method of operating and apparatus for watercraft
US3498247A (en) * 1967-11-29 1970-03-03 Us Navy Supercavitating hydrofoil
US6167829B1 (en) * 1997-10-09 2001-01-02 Thomas G. Lang Low-drag, high-speed ship
WO1999057007A1 (en) * 1998-05-06 1999-11-11 Elms Australia Pty. Ltd. Improved hydrofoil device
WO2001087682A1 (en) * 2000-05-18 2001-11-22 Wingship Limited Wing in ground effect vehicle with endplates
US20050076819A1 (en) * 2002-10-10 2005-04-14 Hilleman Terry Bruceman Apparatus and method for reducing hydrofoil cavitation
JP2004352024A (en) * 2003-05-28 2004-12-16 Tech Res & Dev Inst Of Japan Def Agency Multi-layer structure material for hull and method for simultaneously reducing fluid resistance and self-radiation noise level of sailing body
WO2008069948A1 (en) * 2006-12-01 2008-06-12 Searete Llc System and method for changing the convective heat transfer of a surface
US7517263B1 (en) * 2007-09-05 2009-04-14 The United States Of America As Represented By The Secretary Of The Navy Advanced blade sections for high speed propellers

Also Published As

Publication number Publication date
WO2015001315A2 (en) 2015-01-08

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