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Cryogenic nitrogen as a transonic wind-tunnel test gasThe test gas for the Langley Pilot Transonic Cryogenic Tunnel is nitrogen. Results from analytical and experimental studies that have verified cryogenic nitrogen as an acceptable test gas are reviewed. Real-gas isentropic and normal-shock flow solutions for nitrogen are compared to the ideal diatomic gas solutions. Experimental data demonstrate that for temperatures above the liquefaction boundaries there are no significant real-gas effects on two-dimensional airfoil pressure distributions. Results of studies to determine the minimum operating temperatures while avoiding appreciable effects due to liquefaction are included.
Document ID
19750034269
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Adcock, J. B.
Kilgore, R. A.
Ray, E. J. (NASA Langley Research Center Fluid Dynamics Branch, Hampton, Va., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Research And Support Facilities (Air)
Report/Patent Number
AIAA PAPER 75-143
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting
Location: Pasadena, CA
Start Date: January 20, 1975
End Date: January 22, 1975
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
75A18341
Distribution Limits
Public
Copyright
Other

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