Effects of temperature and pressure on pressure oscillation in the chamber of solid rocket motor

Large eddy simulation was used to study the effects of temperature and pressure on the oscillation in chamber, aiming to explore the pressure oscillation relationship between cold flow test and hot fire, and the possibility of using cold flow test to predict the instability of real rocket motor. The results show obvious consistency between hot and cold flow simulation at the same configuration. The experimental results of full scale motor and numerical simulation validate this consistency. The temperature dominates the oscillation frequency, and the operation pressure dominates the oscillation amplitude.