Abstract
P oscillations in the combustion cavity of rocket motors can impose severe vibrating loads on motor components and associated equipment, especially at or near the resonant structural frequencies. The subject of this paper is the reduction to practice of methods for prediction of combustion instability behavior responsible for these problems. Analysis and experimental data are combined in a computer program to evaluate the various contributions to the growth of oscillations in combustion cavities. Actual calculations are for a 500 Hz oscillation in the Minuteman II Stage III (M-57A1) motor. Table 1 Combustion response parameters for CYH propellant
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