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Simulation of real-gas effects on pressure distributions for aeroassist flight experiment vehicle and comparison with predictionPressure distributions measured on a 60 degree half-angle elliptic cone, raked off at an angle of 73 degrees from the cone centerline and having an ellipsoid nose (ellipticity equal to 2.0 in the symmetry plane) are presented for angles of attack from -10 degrees to 10 degrees. The high normal shock density ratio aspect of a real gas was simulated by testing in Mach 6 air and CF sub 4 (density ratio equal to 5.25 and 12.0, respectively). The effects of Reynolds number, angle of attack, and normal shock density ratio on these measurements are examined, and comparisons with a three dimensional Euler code known as HALIS are made. A significant effect of density ratio on pressure distributions on the cone section of the configuration was observed; the magnitude of this effect decreased with increasing angle of attack. The effect of Reynolds number on pressure distributions was negligible for forebody pressure distributions, but a measurable effect was noted on base pressures. In general, the HALIS code accurately predicted the measured pressure distributions in air and CF sub 4.
Document ID
19920011435
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Micol, John R. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1992
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NAS 1.60:3157
NASA-TP-3157
L-16923
Accession Number
92N20677
Funding Number(s)
PROJECT: RTOP 506-40-41-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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