Effect of External Thermal Radiation on the Burning Rate of Double-Base Solid Propellants (Steady Stimulus)
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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A model has been developed that describes the thermal interaction of an externally applied radiant energy flux with the combustion zone of a burning homogeneous solid propellant. It is shown that only the radiation reaching the propellant surface, and absorbed within the solid phase, can effectively induce burning rate augmentation. Many conditions have been investigated in detail, including the limiting cases of solid-phase surface absorption and deep in-depth absorption with heat generation. This extensive examination has permitted the identification of the necessary conditions for treating the effect of radiation as an increase in the initial propellant temperature. The conditions at which such an equivalence principle is not applicable have also been identified. By extension of the theory, important subsidiary effects on temperature sensitivity have been identified, particularly the role of stabilizers and other propellant ingredients.
- Combustion and Ignition
- Solid Rocket Propellants