Accession Number : ADP002248

Title :   Laser Velocimetry Study of Compressibility Effects on the Flow Field of a Delta Wing,

Corporate Author : VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)

Personal Author(s) : Vorropoulos,G. ; Wendt,J. F.

Report Date : JUL 1983

Pagination or Media Count : 13

Abstract : 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)

Descriptors :   *Vortices, *Flow fields, *Delta wings, Compressive properties, Subsonic flow, Laser velocimeters, Mach number, Shock waves, Belgium

Distribution Statement : APPROVED FOR PUBLIC RELEASE