Accession Number : AD0614004

Title :   AN EXPERIMENTAL STUDY OF LAMINAR NEAR WAKES,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : Muntz,E. P. ; Softley,E. J.

Report Date : APR 1965

Pagination or Media Count : 67

Abstract : The near wakes of a 0.05 nose bluntness ratio, 10 degree half angle sphere cone were investigated. Direct measurements of static temperatures and densities were obtained between the body base and four base diameters downstream. The results indicate that the near wake static temperatures are sensitive functions of both Reynolds number and model surface temperature, but not of Mach number. Wake static temperatures decrease with increasing Reynolds number. The temperatures also decrease with decreasing wall temperature. Nose bluntness effects on wake temperatures were studied experimentally. For 0.05, 0.23 and 0.3 nose bluntness ratio 9 degree and 10 degree half angle sphere cones the maximum temperatures in the wakes increased with increasing nose bluntness ratio. Measurements of base pressure and heat transfer were also obtained. The base pressure ratio increased with increasing bluntness, increasing Mach number and decreasing Reynolds number. The base heat transfer when correlated in terms of base flow parameters was found to be insensitive to variations in bluntness ratio, Mach number and wall temperature. Also, it was only weakly dependent on Reynolds number. (Author)

Descriptors :   (*WAKE, TEMPERATURE), (*BLUNT BODIES, WAKE), (*CONICAL BODIES, WAKE), LAMINAR FLOW, AERODYNAMIC HEATING, HEAT TRANSFER, SLENDER BODIES, REENTRY VEHICLES, PRESSURE, NOSE CONES, REYNOLDS NUMBER

Distribution Statement : APPROVED FOR PUBLIC RELEASE