ON THE STRUCTURE OF A RADIATION-RESISTED SHOCK IN A SIMPLE DISSOCIATING GAS.
AEROSPACE CORP EL SEGUNDO CALIF
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The structure of a radiation-resisted hypersonic shock in a simple dissociating gas is studied by using the quasiequilibrium theory in obtaining the radiation field. The continuous absorption coefficient of the molecules is evaluated from a wave mechanical model developed previously. The basic equations of the problem reduce to a coupled set of integral and differential equations for the velocity and the degree of dissociation. Properties of the structure are found from a study of these equations around the end points in a phase diagram. For quantitative predictions, actual data for the reaction rate constant and the absorption continuum for oxygen are used. It is found that a net amount of radiant energy is transferred from the region immediately behind the shock to the region upstream and further downstream of the shock. This result is a consequence of treating the gas as non-grey. If the gas is taken to be grey, another flow configuration is found. The effect exerted by the radiation on the flow is small for the particular shocks investigated shock Mach number less than twenty in oxygen and free stream pressure ranging from one to ten mm Hg. Author