Accession Number : AD0489115

Title :   REGIMES OF EXOTHERMIC BLUNT BODY FLOW.

Descriptive Note : Technical rept.,

Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE

Personal Author(s) : Sichel, Martin ; Galloway, Arnold J.

Report Date : AUG 1966

Pagination or Media Count : 31

Abstract : It is shown that exothermic blunt body flows in H2-O2 or H2-air mixtures can be characterized by the parameter K = u sub infinity T/R sub b, where u sub infinity is the free stream velocity, T is the ignition delay time and R sub b is the body radius of curvature at the stagnation point. An approximation scaling law relating K to R sub b and p sub infinity, and showing that the parameter psi = K R sub b (p sub infinity) depends only on u sub infinity and the mixture ratio has been found. The detailed behavior of psi has been determined and values of p sub infinity, u sub infinity, psi, and mixture ratio at the explosion limit have been computed. The location of the explosion limit curves suggests experiments in which the effects of quenching should be quite drastic as the explosion boundary is crossed. Rarefied flow effects due to shock and boundary layer thickening are shown to be unimportant. (Author)

Descriptors :   *SHOCK WAVES), *IGNITION), (*BLUNT BODIES, (*SHOCK TUBES, HYDROGEN, OXYGEN, COMBUSTION, BOUNDARY LAYER, REACTION KINETICS, STABILITY, PRESSURE, VELOCITY.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE