Accession Number : AD0640381

Title :   THE METHOD OF CHARACTERISTICS FOR THE SUPERSONIC FLOW OF AN IDEAL DISSOCIATING GAS. II. NONEQUILIBRIUM FLOW,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH MATHEMATICS RESEARCH LAB

Personal Author(s) : Ehlers,F. Edward

Report Date : JUL 1966

Pagination or Media Count : 113

Abstract : A method of characteristics for computing the supersonic, nonequilibrium flow of a reacting and relaxing gas was formulated. The theory was specialized to the ideal dissociating gas of Lighthill and the procedures coded on the IBM 7094. Complete listings of the FORTRAN programs are provided together with instructions as to their use. As examples of the computation techniques, the flows over a wedge and cone were computed and described in detail. For both the wedge and the cone, there developed downstream from the vertex an entropy layer near the wall, a relaxation layer near the shock where the quantities change rapidly, and a near equilibrium layer in between. It was found that it is important to keep the size of the mesh small enough to adequately represent the relaxation layer if satisfactory convergence to the equilibrium state is to be obtained. (Author)

Descriptors :   (*SUPERSONIC FLOW, MATHEMATICAL ANALYSIS), (*NONEQUILIBRIUM FLOW, SUPERSONIC FLOW), DISSOCIATION, COMPUTER PROGRAMMING, WEDGES, CONICAL BODIES, SHOCK WAVES, ENTROPY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE