GB792243A - Control of boundary-layer flow - Google Patents

Control of boundary-layer flow

Info

Publication number
GB792243A
GB792243A GB24753/54A GB2475354A GB792243A GB 792243 A GB792243 A GB 792243A GB 24753/54 A GB24753/54 A GB 24753/54A GB 2475354 A GB2475354 A GB 2475354A GB 792243 A GB792243 A GB 792243A
Authority
GB
United Kingdom
Prior art keywords
holes
boundary layer
flow
aug
rows
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.)
Expired
Application number
GB24753/54A
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.)
Commonwealth of Australia
Original Assignee
Commonwealth of Australia
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 Commonwealth of Australia filed Critical Commonwealth of Australia
Publication of GB792243A publication Critical patent/GB792243A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/08—Aerodynamic models
    • 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
    • B64C21/04—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like for blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/04—Boundary layer controls by actively generating fluid flow
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Advancing Webs (AREA)

Abstract

792,243. Controlling boundary layer flow. COMMONWEALTH OF AUSTRALIA. Aug. 25,1954 [Aug. 27, 1953], No. 24753/54. Class 4. In order to prevent the breakaway of the boundary layer by changing a laminar flow boundary layer to a turbulent flow or to accelerate the transfer of energy in a turbulent boundary layer on an aerofoil surface, air is blown through a row of holes h which are located parallel to the leading edge L, E preferably so that the distance M of the holes from the leading edge is equal to their distance N from the stagnation line S.L. just prior to stalling. The pitch of the holes equals 0.25 M and the ratio pitch/diameter should be greater than 4. Two rows of holes may be provided between the chorded positions L.E. and S.L. and a further embodiment is described in which one or two rows of holes are located on the upper surface of a wing which stalls progressively from the rear as incidence is increased. The invention may be associated with suction holes and suction slots and also applied to air intake ducts and diffusers.
GB24753/54A 1953-08-27 1954-08-25 Control of boundary-layer flow Expired GB792243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU792243X 1953-08-27

Publications (1)

Publication Number Publication Date
GB792243A true GB792243A (en) 1958-03-26

Family

ID=3758924

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24753/54A Expired GB792243A (en) 1953-08-27 1954-08-25 Control of boundary-layer flow

Country Status (1)

Country Link
GB (1) GB792243A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000249A (en) * 1977-06-08 1979-01-04 Alsthom Atlantique Method of preventing destructive phenomena connected with cavitation
EP0052242A1 (en) * 1980-11-15 1982-05-26 DEUTSCHE FORSCHUNGSANSTALT FÜR LUFT- UND RAUMFAHRT e.V. Device for influencing the current at aerodynamic structures
EP0568101A1 (en) * 1992-05-01 1993-11-03 Yamaha Hatsudoki Kabushiki Kaisha Aerodynamic body
US5409287A (en) * 1992-05-01 1995-04-25 Yamaha Hatsudoki Kabushiki Kaisha Aerodynamic device
WO2008059140A3 (en) * 2006-11-03 2008-07-17 Centre Nat Rech Scient Device for delaying boundary layer separation
US8573542B2 (en) 2009-08-26 2013-11-05 Airbus Operations Limited Aerofoil slot blowing
CN104791025A (en) * 2015-03-02 2015-07-22 中国科学院工程热物理研究所 Control structure and method used for reducing separation loss of low-pressure turbine blades
EP2219942B2 (en) † 2007-10-29 2016-08-24 The Boeing Company Systems and methods for control of engine exhaust flow

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000249A (en) * 1977-06-08 1979-01-04 Alsthom Atlantique Method of preventing destructive phenomena connected with cavitation
GB2000249B (en) * 1977-06-08 1982-02-03 Alsthom Atlantique Method of preventing destructive phenomena connected with cavitation
EP0052242A1 (en) * 1980-11-15 1982-05-26 DEUTSCHE FORSCHUNGSANSTALT FÜR LUFT- UND RAUMFAHRT e.V. Device for influencing the current at aerodynamic structures
DE3043567A1 (en) * 1980-11-15 1982-07-08 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln ARRANGEMENT FOR INFLUENCING THE FLOW ON AERODYNAMIC PROFILES
EP0568101A1 (en) * 1992-05-01 1993-11-03 Yamaha Hatsudoki Kabushiki Kaisha Aerodynamic body
US5409287A (en) * 1992-05-01 1995-04-25 Yamaha Hatsudoki Kabushiki Kaisha Aerodynamic device
WO2008059140A3 (en) * 2006-11-03 2008-07-17 Centre Nat Rech Scient Device for delaying boundary layer separation
EP2219942B2 (en) † 2007-10-29 2016-08-24 The Boeing Company Systems and methods for control of engine exhaust flow
US8573542B2 (en) 2009-08-26 2013-11-05 Airbus Operations Limited Aerofoil slot blowing
CN104791025A (en) * 2015-03-02 2015-07-22 中国科学院工程热物理研究所 Control structure and method used for reducing separation loss of low-pressure turbine blades

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