ONE-DIMENSIONAL FLOW WITH CHEMICAL REACTION IN NOZZLE EXPANSIONS

This report presents calculations for a system involving the constituents CO, 02, CO2, and an inert gas having the thermal properties of a mixture of N2 and H20. The proportions of constituents are the same as those of a stoichiometric hydrocarbon-air system; however, only one overall reaction, that of CO + 1/2 O2 ⇄ C02, is assumed to occur. The results of calculations at simulated Mach numbers of 4, 7, and 10 are shown. The effect of uncertainties in the reaction rate constant are also shown. A comparison of the results of the more exact calculations with interpretations based on Penner's criteria is presented. Modes of energy storage other than chemical (for example, vibrational and rotational modes) were assumed to be at equilibrium. Finally, the extent of entropy change in the nonequilibrium reacting gas flow is discussed.