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Low-speed test of translating lip axisymmetric inlets for subsonic transportsTranslating lip, axisymmetric inlets have been tested at freestream Mach numbers between 0.0 and 0.30 and at angles of attack between 0 and 90 degrees. Three isolated inlet models were tested. One model represented the inlet geometry at cruise, that is, with no lip translation. The other two models had forward translating lips with different contours. The low forward speed inlet angle-of-attack capability with the translating lip was increased more than twenty degrees over the basic untranslated lip configuration at the higher inlet airflows. The static inlet performance with the translating lip was also greatly improved. The design translation distance, defined by potential flow analysis, was near optimum.
Document ID
19740024112
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Henne, P. A. (McDonnell-Douglas Corp. Long Beach, CA, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1974
Publication Information
Publisher: NASA
Subject Category
Propulsion Systems
Report/Patent Number
NASA-CR-2467
Accession Number
74N32225
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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