GB687723A - Improvements in suction aerofoils and the like - Google Patents

Improvements in suction aerofoils and the like

Info

Publication number
GB687723A
GB687723A GB8677/50A GB867750A GB687723A GB 687723 A GB687723 A GB 687723A GB 8677/50 A GB8677/50 A GB 8677/50A GB 867750 A GB867750 A GB 867750A GB 687723 A GB687723 A GB 687723A
Authority
GB
United Kingdom
Prior art keywords
skin
porous
head
boundary layer
suction
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
GB8677/50A
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.)
MALCOLM ROBERT HEAD
Original Assignee
MALCOLM ROBERT HEAD
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 MALCOLM ROBERT HEAD filed Critical MALCOLM ROBERT HEAD
Priority to GB8677/50A priority Critical patent/GB687723A/en
Publication of GB687723A publication Critical patent/GB687723A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C21/00Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/02Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B64C21/06Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like for sucking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C2230/00Boundary layer controls
    • B64C2230/04Boundary layer controls by actively generating fluid flow
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C2230/00Boundary layer controls
    • B64C2230/06Boundary layer controls by explicitly adjusting fluid flow, e.g. by using valves, variable aperture or slot areas, variable pump action or variable fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C2230/00Boundary layer controls
    • B64C2230/22Boundary layer controls by using a surface having multiple apertures of relatively small openings other than slots
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00Aeronautics or air transport
    • Y02T50/10Drag reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

687,723. Boundary layer control. HEAD, M.<SP> </SP>R. March 22, 1951. [April 6, 1950] No. 8677/50. Class 4. An aerofoil or like member having means for applying distributed boundary layer suction to the whole or part of its surface embodies a stressed-skin structure including a double-walled skin portion comprising an inner non-porous skin 3 and outer porous skin 7 interconnected by a lattice of web members 5 subdividing the space between the skins into a number of non- intercommunicating cells, each of which communicates through an opening 8 in the inner skin with a cavity or chamber common to a number of cells and to which suction can be applied, each opening having a non-return valve 9 so arranged that when flow takes place through the outer pores and inner openings the loss of head through the latter is considerably greater than that through the latter, the structural characteristics being such that the greater part of the load is taken by the inner skin 3 and lattice members. 5. The non-return valves may consist of flaps of rubber or other flexible non-porous material, their function being to prevent any outflow of air, and thus thickening and possible separation of the boundary layer. The head across the porous skin of individual cells may be varied by regulating the sizes of the openings 8, either individually or collectively. An adhesive or surface bond may be used to join the members 5 to the inner and outer skins, the latter of which may be of the porous material described in Specification 687,724.
GB8677/50A 1950-04-06 1950-04-06 Improvements in suction aerofoils and the like Expired GB687723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8677/50A GB687723A (en) 1950-04-06 1950-04-06 Improvements in suction aerofoils and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8677/50A GB687723A (en) 1950-04-06 1950-04-06 Improvements in suction aerofoils and the like

Publications (1)

Publication Number Publication Date
GB687723A true GB687723A (en) 1953-02-18

Family

ID=9857090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8677/50A Expired GB687723A (en) 1950-04-06 1950-04-06 Improvements in suction aerofoils and the like

Country Status (1)

Country Link
GB (1) GB687723A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256253A (en) * 1991-05-30 1992-12-02 Short Brothers Plc Boundary layer control.
GB2356684A (en) * 1999-11-24 2001-05-30 Lorenzo Battisti Boundary layer control using electroformed microporous material
CN110081068A (en) * 2019-04-29 2019-08-02 吉林大学 A kind of multi-cavity type vacuum chuck

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256253A (en) * 1991-05-30 1992-12-02 Short Brothers Plc Boundary layer control.
GB2256253B (en) * 1991-05-30 1995-01-11 Short Brothers Plc Boundary layer control
GB2356684A (en) * 1999-11-24 2001-05-30 Lorenzo Battisti Boundary layer control using electroformed microporous material
US6682022B2 (en) 1999-11-24 2004-01-27 Lorenzo Battisti Boundary layer control of aerodynamic airfoils
CN110081068A (en) * 2019-04-29 2019-08-02 吉林大学 A kind of multi-cavity type vacuum chuck

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