Accession Number:

AD0651668

Title:

INVISCID RADIATING FLOW OVER A BLUNT BODY,

Descriptive Note:

Corporate Author:

STANFORD UNIV CALIF DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

Report Date:

1966-05-01

Pagination or Media Count:

46.0

Abstract:

The effect of thermal radiation is investigated for the axisymmetric flow over the blunt body associated with a given paraboloidal shock wave. Radiative transfer is treated by means of the differential approximation, which applies to multidimensional flow and is valid throughout the entire range of temperature and optical thickness. The gas is assumed to be perfect and optically grey, and molecular-transport processes are neglected. A semi-analytical solution for the flow and radiation fields is obtained by the method of series truncation. Results are presented, in the strong-shock approximation, for various values of the appropriate dimensionless variables. In general, radiation is found to have significant influence on temperature and density, moderate effect on velocity, and little effect on pressure. The stand-off distance between the shock wave and the body is found to decrease significantly with increasing radiation the body shape is less affected. The results show correct physical behavior throughout the flow field for all values of optical thickness. The detailed flow quantities exhibit a number of features of multidimensional radiating flow. They also provide a check on the special assumptions made in other, more approximate treatments. Similarities between radiating flow and nonequilibrium reactive flow over blunt bodies are apparent. Author

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics
  • Thermodynamics
  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE