EQUILIBRIUM HYDRODYNAMIC VARIABLES BEHIND A REFLECTED SHOCK WAVE IN HYDROGEN

Abstract
Hydrodynamic variables such as density ratio pressure ratio, temperature, fraction of dissociation and ionization and the reflected shock velocity have been calculated for a reflected shock wave in hydrogen for one dimension. The data are presented as families of curves of these variables plotted against the initial shock Mach number for a range of unity to 200 with the initial pressure as a parameter. Hydrodynamic equations are derived which include the effects of dissociation, ionization and atomic excitation. Reference is made to a previous report for the hydrodynamic variables behind the initial shock wave in hydrogen which were used in these calculations. Deviations from the so called strong shock approximation are quite large, especially in the regions where the gas is being dissociated or ionized. The density and pressure ratios across the reflected shock wave may be two to three times greater with a corresponding decrease in the reflected shock velocity and the temperature.

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