Accession Number : AD0491576

Title :   MEASUREMENTS OF TURBULENT HEAT TRANSFER AND SKIN FRICTION REDUCTION ON A POROUS CONE WITH AIR INJECTION AT HIGH MACH NUMBERS

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

Personal Author(s) : Fogaroli, R. P.

Report Date : 22 DEC 1964

Pagination or Media Count : 29

Abstract : Measurements of turbulent heat transfer and skin friction reduction on a large slender porous cone were obtained at cone Mach numbers of 5.3 and 8.1 using air as the injected coolant. The test model had a 7.5 degree half-angle and a 12 inch base diameter. The test extended the available published data to very high mass injection rates and confirmed that the heat transfer reduction due to mass injection is relatively independent of the local edge Mach number. The skin friction results displayed a pronounced dependency on Mach number as established by previous data, indicating that Reynolds analogy with mass transfer is invalid at the high Mach numbers and injection rates encountered by high W/C sub DA ablating vehicles during re-entry. Test data indicated a significant induced pressure effect on the aerodynamic drag force due to large mass injection rates. (Author)

Descriptors :   (*REENTRY VEHICLES, AERODYNAMIC CHARACTERISTICS), (*HEAT TRANSFER, REENTRY VEHICLES), (*FRICTION, REENTRY VEHICLES), TURBULENT BOUNDARY LAYER, CONICAL BODIES, POROUS MATERIALS, BOUNDARY LAYER, AIR, INJECTION, COOLANTS, DRAG, MODEL TESTS, HYPERSONIC FLOW.

Distribution Statement : APPROVED FOR PUBLIC RELEASE