GB792243A - Control of boundary-layer flow - Google Patents
Control of boundary-layer flowInfo
- 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
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.
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)
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 |
-
1954
- 1954-08-25 GB GB24753/54A patent/GB792243A/en not_active Expired
Cited By (10)
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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