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Accession Number:
AD0450558
Title:
BODY SHAPE EFFECTS ON AXISYMMETRIC WAKES
Corporate Author:
GM DEFENSE RESEARCH LABS SANTA BARBARACA
Report Date:
1964-10-01
Abstract:
Experimental measurements have been made of the distance of transition to turbulence of the wake behind hypersonic spherical and blunted cone models at hypersonic speeds in a ballistic range. Transition distances behind blunt bodies were found to be independent of body shape, whereas a definite shape effect was observed for slender bodies. A single shape parameter was determined which successfully correlated all the slender body data. The transition process was found to be markedly different between blunt and slender body flows, the transition occurring rather abruptly behind blunt bodies and being extended over many body diameters for slender bodies. In all cases, the transition distances were independent of body size and flight speed. The correlations were found to break down at high Reynolds numbers where turbulence originated at the recompression region. A method of using the distance to transition in clean wakes to discriminate between blunt and slender bodies is outlined. Author
Descriptive Note:
Technical rept.
Pages:
0056
Distribution Statement:
Approved for public release; distribution unlimited.
Contract Number:
DA-01-021-AMC-11359(Z)
Contract Number 2:
ARPA ORDER-347
File Size:
1.62MB
