Accession Number : AD0600592

Title :   INVISCID, NONADIABATIC FLOW ABOUT BLUNT BODIES.

Descriptive Note : Technical rept.

Corporate Author : LOCKHEED MISSILES AND SPACE CO SUNNYVALE CALIF

Personal Author(s) : Wilson,K. H. ; Hoshizaki,H.

Report Date : JAN 1964

Pagination or Media Count : 54

Abstract : The problem considered is that of determining the inviscid, nonadiabatic flow field which results when energy loss by radiation becomes significant. The approach taken is to include the radiation term in the energy equation and solve the resulting conservation equations for the flow past a blunt body. The direct blunt-body problem is solved using an integral method of solution. The flow field is determined in an iterative manner in which the shock shape from the previous iteration is used in the current iteration. Hence, in the final analysis, no a priori information about the shock shape is required. Results have been obtained for the flow about a sphere and a hemispherecone under conditions where large energy loss from the shock layer occurs. The nonadiabatic nature of such a flow was found to significantly reduce the shock layer thickness about the body and alter the enthalpy profiles within the shock layer. As expected, the radiative heating is reduced considerably from the adiabatic value for cases where large nonadiabatic effects are present.

Descriptors :   (*AERODYNAMIC HEATING, BLUNT BODIES), (*ATMOSPHERE ENTRY, AERODYNAMIC HEATING), GAS FLOW, THERMAL RADIATION, SHOCK WAVES

Distribution Statement : APPROVED FOR PUBLIC RELEASE