CA2434541A1 - Recesses on a surface - Google Patents

Recesses on a surface Download PDF

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Publication number
CA2434541A1
CA2434541A1 CA002434541A CA2434541A CA2434541A1 CA 2434541 A1 CA2434541 A1 CA 2434541A1 CA 002434541 A CA002434541 A CA 002434541A CA 2434541 A CA2434541 A CA 2434541A CA 2434541 A1 CA2434541 A1 CA 2434541A1
Authority
CA
Canada
Prior art keywords
cavity
cavities
disruption edge
formations
disruption
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.)
Granted
Application number
CA002434541A
Other languages
French (fr)
Other versions
CA2434541C (en
Inventor
Fred Olsen
Hans Oigarden
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.)
Fobox AS
Original Assignee
Fobox As
Fred Olsen
Hans Oigarden
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 Fobox As, Fred Olsen, Hans Oigarden filed Critical Fobox As
Publication of CA2434541A1 publication Critical patent/CA2434541A1/en
Application granted granted Critical
Publication of CA2434541C publication Critical patent/CA2434541C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/10—Influencing air flow over aircraft surfaces by affecting boundary layer flow using other surface properties, e.g. roughness
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/002—Influencing flow of fluids by influencing the boundary layer
    • F15D1/0025—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply
    • F15D1/003—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions
    • F15D1/005—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions in the form of dimples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/10—Influencing flow of fluids around bodies of solid material
    • F15D1/12—Influencing flow of fluids around bodies of solid material by influencing the boundary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/26—Boundary layer controls by using rib lets or hydrophobic surfaces
    • 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
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/10—Drag reduction
    • 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

Abstract

Formations on the surface of bodies for reducing the drag relative to a medium which the body is located in or close to. The formations comprise a plurality of cavities (1,20,40,60). The surface in which the cavities are formed is closed. The cavity has a disruption edge (5,25,44,66) adjacent to the cavity, with the disruption edge located upstream of the cavity, so as to set the flowing medium most proximal to the surface into turbulence upon passing the disruption edge. The cavity has a maximum depth from the surface of at least approximately 2mm.
CA002434541A 2001-02-02 2002-02-01 Recesses on a surface Expired - Fee Related CA2434541C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20010579A NO313544B1 (en) 2001-02-02 2001-02-02 Embodiments on the surface of a body
NO20010579 2001-02-02
PCT/NO2002/000042 WO2002064422A1 (en) 2001-02-02 2002-02-01 Recesses on a surface

Publications (2)

Publication Number Publication Date
CA2434541A1 true CA2434541A1 (en) 2002-08-22
CA2434541C CA2434541C (en) 2008-10-21

Family

ID=19912087

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002434541A Expired - Fee Related CA2434541C (en) 2001-02-02 2002-02-01 Recesses on a surface

Country Status (11)

Country Link
US (1) US6880476B2 (en)
EP (1) EP1365950A1 (en)
JP (2) JP2004524207A (en)
KR (1) KR100858526B1 (en)
CN (1) CN1325327C (en)
AU (1) AU2002230309B2 (en)
BR (1) BR0206740A (en)
CA (1) CA2434541C (en)
EA (1) EA004812B1 (en)
NO (1) NO313544B1 (en)
WO (1) WO2002064422A1 (en)

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NO313544B1 (en) * 2001-02-02 2002-10-21 Fred Olsen Embodiments on the surface of a body
DE10301080A1 (en) 2002-10-22 2004-05-13 Siemens Ag Wind turbine
BE1016624A3 (en) * 2005-06-02 2007-03-06 Rompay Boudewijn Gabriel Van Underwater surface for e.g. boat hull or propeller, includes macroscopic irregularities for improving hydrodynamics
US8113469B2 (en) 2006-02-21 2012-02-14 University Of Alabama Passive micro-roughness array for drag modification
EP1844860B1 (en) * 2006-04-12 2013-12-18 J. Wagner GmbH Spray pistol with a structured surface for dispensing atomising gas
US7412334B2 (en) * 2006-04-27 2008-08-12 Agilent Technologies, Inc Mass spectrometer and method for enhancing resolution of mass spectra
NL1032739C2 (en) * 2006-10-24 2008-04-25 Kick Off Ltd Object with surface for generating microwaves.
US8794574B2 (en) * 2007-03-30 2014-08-05 The Board Of Trustees Of The University Of Alabama Micro-array surface for passive drag modification
EP2031244A1 (en) * 2007-08-31 2009-03-04 Lm Glasfiber A/S Means to maintain flow of a flowing medium attached to the exterior of a flow control member by use of crossing sub-channels
EP2031243A1 (en) * 2007-08-31 2009-03-04 Lm Glasfiber A/S Means to maintain a flow attached to the exterior of a flow control member
ES2326356B1 (en) * 2008-03-31 2010-07-13 Maria Desamparados Segura Mecho AERODYNAMIC DRIVING ELEMENT.
US8646373B1 (en) 2009-05-04 2014-02-11 Nova Research, Inc. Blast wave effects reduction system
CN101973318A (en) * 2010-10-09 2011-02-16 侯谦 Low-wind resistance and energy-saving casing structure of high-speed vehicle
CN103321991A (en) * 2012-03-19 2013-09-25 周向进 Method for reducing air friction of vehicles, trains and planes
US20130330184A1 (en) * 2012-06-08 2013-12-12 General Electric Company Aerodynamic element of turbine engine
US20140243147A1 (en) * 2013-02-28 2014-08-28 Transmission Cvtcorp Inc. Continuously Variable Transmission (CVT) Having a Coaxial Input/Output Arrangement and Reduced Friction Losses
FR3023322B1 (en) * 2014-07-03 2019-09-06 Safran Aircraft Engines AIR INLET HANDLE FOR TURBOMACHINE
USD886026S1 (en) * 2015-03-10 2020-06-02 Silverstream Technologies B.V. Set of air cavities for hull surface of vessel
US20170234225A1 (en) * 2016-02-13 2017-08-17 General Electric Company Component cooling for a gas turbine engine
TWI722062B (en) * 2016-11-30 2021-03-21 梅正新 Structure to reduce ship's sailing resistance
US20190351974A1 (en) * 2016-11-30 2019-11-21 Chen-Hsin Mei Structure for reducing the drag of a ship and its application
CN107605874B (en) * 2017-08-09 2019-11-15 浙江大学 A kind of anti-cavitation corrosion micro-structure surface layer
CN108327894B (en) * 2017-12-29 2021-07-06 西北工业大学 Sand ridge simulating pneumatic resistance reducing tongue-shaped microstructure
WO2019233680A1 (en) * 2018-06-04 2019-12-12 Universiteit Gent Devices and methods for hydrocarbon cracking
USD919544S1 (en) * 2019-05-29 2021-05-18 Silverstream Technologies B.V. Air release unit
US11614106B2 (en) 2019-08-21 2023-03-28 Lockheed Martin Corporation Partially submerged periodic riblets
JP7335766B2 (en) * 2019-09-30 2023-08-30 株式会社Subaru rectifier
EP3943386A1 (en) * 2020-07-23 2022-01-26 BAE SYSTEMS plc An arrangement for influencing liquid flow and a method
EP4185526A1 (en) * 2020-07-23 2023-05-31 BAE SYSTEMS plc An arrangement for influencing liquid flow and a method
EP3943387A1 (en) * 2020-07-23 2022-01-26 BAE SYSTEMS plc An arrangement for influencing liquid flow and a method
EP4185525A1 (en) * 2020-07-23 2023-05-31 BAE SYSTEMS plc An arrangement for influencing liquid flow and a method
PT117851A (en) * 2022-03-10 2023-09-11 Miguel Cardoso Prata Dos Santos Pedro TURBULENT FLOW PROMOTING SURFACE

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US632738A (en) * 1898-12-02 1899-09-12 James O'hara Covering for bodies impelled through water.
US1452961A (en) * 1920-06-28 1923-04-24 Dornier Metallbauten Gmbh Guttiform section
US2800291A (en) * 1950-10-24 1957-07-23 Stephens Arthur Veryan Solid boundary surface for contact with a relatively moving fluid medium
FR1325714A (en) * 1962-03-16 1963-05-03 Method and device for improving traffic flow on aircraft
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NO313544B1 (en) * 2001-02-02 2002-10-21 Fred Olsen Embodiments on the surface of a body

Also Published As

Publication number Publication date
KR100858526B1 (en) 2008-09-12
CA2434541C (en) 2008-10-21
WO2002064422A8 (en) 2003-12-11
AU2002230309B2 (en) 2007-10-04
EP1365950A1 (en) 2003-12-03
WO2002064422A1 (en) 2002-08-22
EA004812B1 (en) 2004-08-26
NO313544B1 (en) 2002-10-21
JP2004524207A (en) 2004-08-12
CN1325327C (en) 2007-07-11
CN1496316A (en) 2004-05-12
NO20010579L (en) 2002-08-05
NO20010579D0 (en) 2001-02-02
EA200300728A1 (en) 2004-02-26
US20040083938A1 (en) 2004-05-06
JP2008157465A (en) 2008-07-10
BR0206740A (en) 2004-02-10
US6880476B2 (en) 2005-04-19
KR20030071877A (en) 2003-09-06

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