Development and Evaluation of Rotating Valve Combustion Response Test Technique.

摘要

Studies have been conducted to extend the frequency and pressure range of the rotating valve method for measuring the pressure coupled combustion response of solid propellants. Tests were conducted to evaluate the combustion response of ANB-3066 and UTP-17,075 at pressures of 500, 1,000, and 1,500 psi. The frequency covered the range from 85 to 800 Hz. Frequency and combustion pressure both affect the combustion response, the effect depending on the propellant formulation. Additional tests with UTP-18,586 and Shuttle SRM propellant also showed additional formulation effects on the response. In all cases, the response function extrapolates to the burning rate pressure exponent as predicted by linear combustion theory. A series of tests was also conducted with ANB-3066 from the T-burner master batch. The results were identical to the results obtained on the first program, provided the tests were conducted with samples freshly cut from the cartons. When the samples were potted into motor cases and stored for two years, however, the measured combustion response changed significantly.