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Aerodynamic Shutoff ValveAerodynamic flow achieved by adding fixed fairings to butterfly valve. When valve fully open, fairings align with butterfly and reduce wake. Butterfly free to turn, so valve can be closed, while fairings remain fixed. Design reduces turbulence in flow of air in internal suction system. Valve aids in development of improved porous-surface boundary-layer control system to reduce aerodynamic drag. Applications primarily aerospace. System adapted to boundary-layer control on high-speed land vehicles.
Document ID
19920000102
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Horstman, Raymond H.
(Boeing Commercial Airplane Co.)
Date Acquired
August 15, 2013
Publication Date
February 1, 1992
Publication Information
Publication: NASA Tech Briefs
Volume: 16
Issue: 2
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
LAR-14196
Accession Number
92B10102
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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