Hybrid combustion of an aluminized polystyrene/oxygen system has been investigated. The mass consumption rate of the fuel is found to be proportional to the square root of the mass consumption rate of the oxidizer. The regression rate depends on time, as was found to be the case for an unmetallized propellant. The role of radiative heat transfer to the combustion products and unreacted oxidizer is confirmed when the data are analyzed in the context of the theory of Marxman et al. Analysis of the data takes into account the heat taken away by metal particles during combustion. This is found to be strongly dependent on the oxidizer flow rate.
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