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Laser Velocimetry Study of Compressibility Effects on the Flow Field of a Delta Wing,
VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)
Compressibility effects on the lee-side vortical flow field of a delta wing at incidence were studied using laser doppler velocimetry. The tests covered the Mach number range from 0.18 to 0.80 both axial and circumferential velocity components were measured. It was found that the axial velocity excess observed at low Mach numbers became an axial velocity deficit at Mach numbers above 0.6. Strong asymmetry was observed in the circumferential velocity distribution at the higher Mach numbers. A flow picture including an embedded shock wave is proposed as physical explanation of the observed compressibility effects. Author
This article is from 'Aerodynamics of Vortical Type Flows in Three Dimensions: Conference Proceedings Held at Rotterdam, Netherlands on 25-28 April 1983,' AD-A135 157, p9-1-9-13.