An evaluation is conducted of the accuracy of the 'Preston tube' surface pitot-pressure skin friction measurement method relative to the already proven laser interferometer skin-friction meter in a swept shock wave/turbulent boundary-layer interaction. The Preston tube was used to estimate the total shear-stress distribution in a fin-generated swept shock-wave/turbulent boundary-layer interaction. The Keener-Hopkins calibration method using the isentropic relation to calculate the Preston-tube Mach number produces the best results.
Laser interferometer/Preston tube skin-friction comparison in shock/boundary-layer interaction
AIAA Journal ; 29
01.06.1991
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Englisch
British Library Conference Proceedings | 1993
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