SOLID PROPELLANT IGNITION BY CONVECTIVE HEATING.
LITTLE (ARTHUR D) INC CAMBRIDGE MASS
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The objective of the study was to determine the effects of gas flow characteristics on solid propellant ignition behavior under convective heating. Ignition tests of three composite propellants were conducted in a hot-gas tunnel designed for convective heating experiments. Effects of gas velocity, test chamber configuration, and approach surface material on ignition were observed. It is concluded that ignition is initiated in the gas phase and is influenced by the local temperature and the local concentration of oxidizer decomposition products from upstream portions of the propellant surface. Either temperature or oxidizer concentration may control the time of ignition. When oxidizer concentration is controlling, the test configuration and gas velocity are important parameters. When temperature is controlling, ignition time can be correlated with heating rate alone. However, long propellant samples must be used to obtain meaningful data. Ignition times measured with long propellant samples are considerably lower than those measured with small samples. Author
- Combustion and Ignition
- Solid Rocket Propellants