Abstract
Theme T HE combustion efficiency of highly metallized hybrid propellant compositions is seriously reduced by: a) the microheterogeneous combustion character, which is typical for metal particle combustion; and b) the macroheterogeneous combustion character, which is typical for hybrid propellant combustion. In order to analyze the principal problems of these combustion phenomena, experimental investigations were performed in a transparent slab-burner. High-speed photographs, regression-rate measurements and exhaust product analyses were used to identify the role of the propellant formulation on the combustion behavior, including the effects of: a) oxidizercomposition, b) polymerbinder-type, c) metal-type, and d) metal-loading. The primary test objectives hereby were to qualitatively determine the causes for inefficient metal combustion and to provide information for the selection of an optimal propellant formulation for future motor firings.
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