WO2001096178A1 - Corps aerodynamique comprenant des conduits de diffusion entre les cotes pression et aspiration - Google Patents

Corps aerodynamique comprenant des conduits de diffusion entre les cotes pression et aspiration Download PDF

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Publication number
WO2001096178A1
WO2001096178A1 PCT/IE2001/000081 IE0100081W WO0196178A1 WO 2001096178 A1 WO2001096178 A1 WO 2001096178A1 IE 0100081 W IE0100081 W IE 0100081W WO 0196178 A1 WO0196178 A1 WO 0196178A1
Authority
WO
WIPO (PCT)
Prior art keywords
wing
ducts
air
pressure
fluid
Prior art date
Application number
PCT/IE2001/000081
Other languages
English (en)
Other versions
WO2001096178A8 (fr
WO2001096178B1 (fr
Inventor
Gerard Moran
Original Assignee
Gerard Moran
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 Gerard Moran filed Critical Gerard Moran
Priority to AU74433/01A priority Critical patent/AU7443301A/en
Publication of WO2001096178A1 publication Critical patent/WO2001096178A1/fr
Publication of WO2001096178B1 publication Critical patent/WO2001096178B1/fr
Publication of WO2001096178A8 publication Critical patent/WO2001096178A8/fr

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
    • B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B64C21/025—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like for simultaneous blowing and sucking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/20—Boundary layer controls by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/28—Boundary layer controls at propeller or rotor blades
    • 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
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the science defines a combination of forces caused by the motion of the wing in the air.
  • the upper surface is in contact with the air in an ordered way via a laminar boundary layer and there is a static pressure drop distributed through this layer to the free stream.
  • the wing presses againsfc the air thrusting it down to utilise dynamic pressure.
  • Wing designers are concerned with optimizing a lift/drag ratio in a given operating range. Wings which operate effeciently at high velocities need additional devices to increase lift at landing and take off. There are a variety of high lift devices which can be approximately classified as either slots or flaps, or a combination of the two.
  • the objective of ulticomponent wings are mainly to increase the effective angle of attack at slow or stalling speeds. Increasing the dynamic pressure below the wing by these means introduces problems associated with drag and of boundary layer seperation. Slots, slats,blown and suction wings are essentially measures to controll boundary layer seperation.
  • Lift and drag are functions mainly of such factors as velocity squared, area and density. Of the three types of drag, skin friction contributes most to lift at regular speeds. Form drag can be minimized by streaming and can be associated with area and high ' lift devices. Induced drag is related to pressure energies at wing tips and can be reduced by high aspect area and by winglets and wing grids which harness these energies to enhance lift.
  • Thrusting air below a wing to increase dynamic pressure is inherently inneficient and it also increases the static pressure laterally drawing more air into the stream.
  • the momentum transfer above the wing in the boundary layer which is associated with skin friction and viscosity is inherently more effecient because viscosity is a resistance to velocity not acceleration.
  • In colissions forces or interactions between bodies are seldom equal and opposite except where bodies are perfectly elastic and matched for inertia. It is worth considering then the elasticity of air as well as better ways of utilizing viscous effects to conserve kinetic energy in aerodynamic applications.
  • the advantage of elasticity as a means of conserving kinetic energy in colissions results from the proportionality of elastic force and extension known as Hookes law.
  • Diffuser designs differ for subsonic and supersonic flow and the length is .related to the ambient pressure, ideally of a great length in space. The possibility exists for greater controll of expansion more versatile and effecient operation by ducting gases through the walls of the diffuser.
  • Air can be used as a pneumatic spring if it is suitabely contained. It is the subject of this invention to utilise the elastic properties of fluids such as air by using diffuser like ducts in motion so as to throttle the flow through them and utilising the effects of skin friction, fluid elasticity and inertia i - a novel device which conserves momentum and energy or the action energy potential.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un procédé consistant à ajouter des conduits à des composants aérodynamiques classiques afin de mieux utiliser l'élasticité de l'air, par exemple. Le procédé décrit dans cette invention permet d'obtenir une propulsion et un vol plus polyvalents, plus efficaces et de faible puissance.
PCT/IE2001/000081 2000-06-13 2001-06-13 Corps aerodynamique comprenant des conduits de diffusion entre les cotes pression et aspiration WO2001096178A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU74433/01A AU7443301A (en) 2000-06-13 2001-06-13 Aerodynamic body comprising diffusor ducts between pressure and suction sides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IE20000478 2000-06-13
IES2000/0478 2000-06-13

Publications (3)

Publication Number Publication Date
WO2001096178A1 true WO2001096178A1 (fr) 2001-12-20
WO2001096178B1 WO2001096178B1 (fr) 2002-03-28
WO2001096178A8 WO2001096178A8 (fr) 2004-03-25

Family

ID=11042628

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IE2001/000081 WO2001096178A1 (fr) 2000-06-13 2001-06-13 Corps aerodynamique comprenant des conduits de diffusion entre les cotes pression et aspiration

Country Status (2)

Country Link
AU (1) AU7443301A (fr)
WO (1) WO2001096178A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE375402A (fr) *
GB161978A (en) * 1920-04-21 1921-12-29 Luigi Savani Improvements in the carrying planes of aeroplanes and air-craft
DE510383C (de) * 1930-10-18 Karl Mix Dipl Ing Flugzeugfluegel mit duesenartigen Kanaelen
FR785291A (fr) * 1934-02-05 1935-08-06 Perfectionnement dans les hélices et ailes tournantes avec ouvertures à travers les pales, pour toutes applications
US2077071A (en) * 1936-11-10 1937-04-13 William K Rose Airplane
US2850873A (en) * 1957-08-16 1958-09-09 United Aircraft Corp By-pass ramjet
GB2080215A (en) * 1980-07-24 1982-02-03 Gays Richard Ernest Gliding type parachute
US4934632A (en) * 1987-12-03 1990-06-19 Kyusik Kim Aerothermal ultra hypersonic aircraft
EP0389395A1 (fr) * 1989-03-21 1990-09-26 Yvon Belliard Gréement de navire ou d'engin équivalent
JPH0617704A (ja) * 1991-08-06 1994-01-25 Uchu Kagaku Kenkyusho エアーターボラムジェットエンジンの流体混合保炎器
US5810294A (en) * 1997-03-25 1998-09-22 Knight; Carl E. Vaneless rotary kite

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE375402A (fr) *
DE510383C (de) * 1930-10-18 Karl Mix Dipl Ing Flugzeugfluegel mit duesenartigen Kanaelen
GB161978A (en) * 1920-04-21 1921-12-29 Luigi Savani Improvements in the carrying planes of aeroplanes and air-craft
FR785291A (fr) * 1934-02-05 1935-08-06 Perfectionnement dans les hélices et ailes tournantes avec ouvertures à travers les pales, pour toutes applications
US2077071A (en) * 1936-11-10 1937-04-13 William K Rose Airplane
US2850873A (en) * 1957-08-16 1958-09-09 United Aircraft Corp By-pass ramjet
GB2080215A (en) * 1980-07-24 1982-02-03 Gays Richard Ernest Gliding type parachute
US4934632A (en) * 1987-12-03 1990-06-19 Kyusik Kim Aerothermal ultra hypersonic aircraft
EP0389395A1 (fr) * 1989-03-21 1990-09-26 Yvon Belliard Gréement de navire ou d'engin équivalent
JPH0617704A (ja) * 1991-08-06 1994-01-25 Uchu Kagaku Kenkyusho エアーターボラムジェットエンジンの流体混合保炎器
US5810294A (en) * 1997-03-25 1998-09-22 Knight; Carl E. Vaneless rotary kite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 224 (M - 1596) 22 April 1994 (1994-04-22) *

Also Published As

Publication number Publication date
AU7443301A (en) 2001-12-24
WO2001096178A8 (fr) 2004-03-25
WO2001096178B1 (fr) 2002-03-28

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