GB713426A - Improvements in or relating to external surfaces for moving craft - Google Patents

Improvements in or relating to external surfaces for moving craft

Info

Publication number
GB713426A
GB713426A GB26601/50A GB2660150A GB713426A GB 713426 A GB713426 A GB 713426A GB 26601/50 A GB26601/50 A GB 26601/50A GB 2660150 A GB2660150 A GB 2660150A GB 713426 A GB713426 A GB 713426A
Authority
GB
United Kingdom
Prior art keywords
wall
porous element
craft
duct
strips
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
GB26601/50A
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.)
GUSTAV VICTOR LACHMANN
Handley Page Ltd
Original Assignee
GUSTAV VICTOR LACHMANN
Handley Page Ltd
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 GUSTAV VICTOR LACHMANN, Handley Page Ltd filed Critical GUSTAV VICTOR LACHMANN
Priority to GB26601/50A priority Critical patent/GB713426A/en
Publication of GB713426A publication Critical patent/GB713426A/en
Expired 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
    • B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B64C21/06—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like for sucking
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/06—Boundary layer controls by explicitly adjusting fluid flow, e.g. by using valves, variable aperture or slot areas, variable pump action or variable fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/22—Boundary layer controls by using a surface having multiple apertures of relatively small openings other than slots
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Laminated Bodies (AREA)
  • Advancing Webs (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)

Abstract

713,426. Boundary layer control on aircraft and submarines. HANDLEY PAGE, Ltd., and LACHMANN, G. V. Oct. 23, 1951 [Oct. 31, 1950], No. 26601/50. Classes 4 and 113(2) A wall for an aircraft or submarine incorporates, in a part of the wall over which an enveloping fluid flows during forward movement of the craft, a chamber, defined within a structural element, which is one of the load carrying members of the wall, and covered by a porous element forming part of said wall and extending transversely to the direction of forward movement of the craft, the outer wall of the strutural element reinforcing the wall of the craft to leave the porous element substantially unstressed, being recessed and thereby spaced from the porous element and being apertured to permit passage of fluid from the porous element to the chamber, said chamber being connected to a discharge duct leading away from the porous element and including suction means for producing a pressure differential across the porous element, whereby a flow of enveloping fluid through the porous element is engendered and laminar flow in the boundary layer of said enveloping fluid thereby stabilised. The outer skin 2 is thickened locally and formed with slots 4 to receive tongues 3 formed on the lateral edges of strips 1 of porous material. A duct 5, which acts also as a structural member is secured to the skin 2 by rivets 6 adjacent each slot, the wall 7 of the duct being spaced from the strip 1 and perforated at 8. Abutting skin panels are reinforced adjacent their edges 9 and secured to formers 10 which are attached to the members 5 by cleats 11. The various ducts 5 may be collectively connected to a suction pump or each may be connected to an individual pump. The porosity of the strips 1 or the sizes of the apertures 8 and the ducts 5 may be varied to give varying degrees of boundary layer suction over different parts of the surface. In alternative arrangements inner and outer skins may sandwich corrugated structural members forming a plurality of ducts some of which may be associated with the strips 1, the outer skin being sufficiently thick to form a perforated duct below the strip. In another embodiment the outer skin is formed with a plurality of parallel lands and perforated therebetween, a layer of steel or nickel alloy gauze cloth being stretched over and secured to this structure.
GB26601/50A 1950-10-31 1950-10-31 Improvements in or relating to external surfaces for moving craft Expired GB713426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26601/50A GB713426A (en) 1950-10-31 1950-10-31 Improvements in or relating to external surfaces for moving craft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26601/50A GB713426A (en) 1950-10-31 1950-10-31 Improvements in or relating to external surfaces for moving craft

Publications (1)

Publication Number Publication Date
GB713426A true GB713426A (en) 1954-08-11

Family

ID=10246183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26601/50A Expired GB713426A (en) 1950-10-31 1950-10-31 Improvements in or relating to external surfaces for moving craft

Country Status (1)

Country Link
GB (1) GB713426A (en)

Cited By (6)

* 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.
FR2697495A1 (en) * 1992-11-02 1994-05-06 Rohr Inc Aircraft turbine engine nacelle arrangement with laminar flow control.
US6752358B1 (en) 1999-06-24 2004-06-22 Bae Systems Plc Laminar flow control system and suction panel for use therewith
US20150083258A1 (en) * 2013-06-04 2015-03-26 The Boeing Company Efficient fluid dynamic and structural design and integration method to achieve extended hybrid laminar flow control
EP3159259A1 (en) * 2015-10-20 2017-04-26 Airbus Operations, S.L. Leading edge with laminar flow control and manufacturing method thereof
DE102016204210A1 (en) * 2016-03-15 2017-09-21 Airbus Operations Gmbh Boundary layer influencing aerodynamic component and method of making the same

Cited By (9)

* 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
FR2697495A1 (en) * 1992-11-02 1994-05-06 Rohr Inc Aircraft turbine engine nacelle arrangement with laminar flow control.
US6752358B1 (en) 1999-06-24 2004-06-22 Bae Systems Plc Laminar flow control system and suction panel for use therewith
US20150083258A1 (en) * 2013-06-04 2015-03-26 The Boeing Company Efficient fluid dynamic and structural design and integration method to achieve extended hybrid laminar flow control
US9487288B2 (en) 2013-06-04 2016-11-08 The Boeing Company Apparatus and methods for extending hybrid laminar flow control
EP3159259A1 (en) * 2015-10-20 2017-04-26 Airbus Operations, S.L. Leading edge with laminar flow control and manufacturing method thereof
DE102016204210A1 (en) * 2016-03-15 2017-09-21 Airbus Operations Gmbh Boundary layer influencing aerodynamic component and method of making the same
US10723443B2 (en) 2016-03-15 2020-07-28 Airbus Operations Gmbh Boundary-layer-influencing aerodynamic part and method for producing the same

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