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Comments on Reynolds number effects and the role of NTF in the development of air vehicles (1981)

Nagel, A. L.

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Publication Date: 2011-08-18

Description: The 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.

Keywords: AERODYNAMICS

Type: NASA. Langley Research Center High Reynolds Number Res. - 1980; p 143-148

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