Abstract
Results are presented from an experimental study of solid propellant extinguishment by rapid depressurization. Systematic variations in propellant binder, oxidizer loading level, burning rate catalyst, metal loading, and exhaust pressure level were studied. The effects of motor configuration on extinguishment and reignition are discussed. Results indicate that combustion extinguishment requirements are determined by the binder type, percentage of ammonium perchlorate oxidizer, motor geometry, and exhaust pressure level as well as the pressure and depressurization rate. The von Elbe model with a coefficient of one provides a rough correlation of extinguishment requirements.
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