GB687723A - Improvements in suction aerofoils and the like - Google Patents
Improvements in suction aerofoils and the likeInfo
- 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
Links
- 239000011148 porous material Substances 0.000 abstract 3
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 230000008719 thickening Effects 0.000 abstract 1
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)
- 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.
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)
| 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 |
-
1950
- 1950-04-06 GB GB8677/50A patent/GB687723A/en not_active Expired
Cited By (5)
| 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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