Accession Number : AD0259050

Title :   EXPANSION AND DIFFUSION OF A LAYER OF HOT GAS IN THE PRESENCE OF THERMAL RADIATION

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE FLUID DYNAMICS RESEARCH LAB

Personal Author(s) : CHOW,CHUEN-YEN

Report Date : MAR 1961

Pagination or Media Count : 1

Abstract : A radiating gas slab at very high temperature and moderate pressure expands and diffuses into the surrounding cold atmosphere. Under the assumption that the effect of adiabatic cooling is small compared to that of radiation cooling, and that the energy flux radiated from the interior of the gas slab is much greater than the influx, the equations of motion are solved to obtain the distributions of temperature, density, pressure, particle velocity and radiation flux inside the slab as functions of time and a space coordinate. The positions and velocities of the slab's bounding surface at different times are also obtained. The magnitude of the neglected adiabatic cooling term in the energy equation is then computed and compared with the radiation term, to show that it can be neglected. (Author)

Descriptors :   *COMPRESSIBLE FLOW, *GASES, *SHOCK WAVES, *THERMAL RADIATION, DIFFUSION, EXPLOSIONS, HEAT, HEAT TRANSFER, MATHEMATICAL ANALYSIS, NUMERICAL ANALYSIS, THERMODYNAMICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE