Studies of Opposed Flow Diffusion Flames with Solid-gas Interface— I. Experimental Measurements of Ammonium Perchlorate-Hydrocarbon Systems

Abstract

To examine the gas-kinetics parameters pertinent to the flame reactions of ammonium perchlorate (AP) based propellants we have employed the heterogeneous opposed flow diffusion flame (HOFD). In this combustion system a diffusion flame is formed in the stagnation region between a gaseous stream of fuel and an opposing stream of oxidizer originating at the solid surface of A P. With increasing fuel flux the steady-state mass flux of AP reaches a value at which the kinetics of reaction limit the consumption of reactants. This limiting condition provides information on the gas phase kinetic parameters of the combustion system. Both the composition of the solid oxidizer and the gaseous fuels were varied in ( The experimental studies. The effect of different catalysts and solid fuels on the burning rate characteristics of the solid phase were examined. A number of gaseous hydrocarbon fuels were used . Based on the results kinetic expressions are derived for the overall combustion progress in the diffusion flame of solid propellants based on AP.