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Comments on Reynolds number effects and the role of NTF in the development of air vehiclesThe National Transonic Facility (NTF) capability to match the full scale Reynolds numbers of all but the largest airplanes is discussed. Conversion factors to enable calculation of Sl-unit equivalents for all U.S. units are listed. Using data from several facilities, analytic methods, and flight test data, a competetive aircraft in the relatively low Reynolds number was developed. The NTF offers the capability to obtain data at full scale Reynolds numbers in the cruise condition for most of the products, and will be much closer than previous tunnels to full scale Reynolds number for the operating envelopes. It is primarily on the operating envelope that Reynolds number effects are most important and least predictable.
Document ID
19810022600
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nagel, A. L.
(Boeing Commercial Airplane Co. Seattle, WA, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1981
Publication Information
Publication: NASA. Langley Research Center High Reynolds Number Res. - 1980
Subject Category
Aerodynamics
Accession Number
81N31142
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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