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Flow structure generated by perpendicular blade vortex interaction and implications for helicopter noise predictionsActivities carried out in support of research on flow structure generated by perpendicular blade vortex interaction and implications for helicopter noise prediction are summarized. Progress in the following areas is described: (1) construction of 8 inch-chord NACA 0012 full-span blade; (2) Acquisition of two full-span blades; (3) preparation for hot wire measurements; (4) related work on a modified Betz's theory; and (5) work related to helicopter noise prediction. In addition, a list of publications based on the results of prior experimentation is presented.
Document ID
19940029701
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Devenport, William J. (Virginia Polytechnic Inst. Blacksburg, VA, United States)
Glegg, Stewart A. L. (Virginia Polytechnic Inst. Blacksburg, VA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.26:195824
NASA-CR-195824
Accession Number
94N34207
Funding Number(s)
CONTRACT_GRANT: NAG1-1539
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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