To study the influence of inlet angle and injection water law on flow field and interior ballistics

the Mixture multi-phase flow model

Renormalization group (RNG) k-ε turbulence model and dynamic mesh technology were adopted to build gas-steam ejection numeric calculation model. Comparing the calculation results with the literature data

it proved that the numerical method was effective. And on this basis

the influences of inlet angle and injection water law on gas-steam ejection power system were analyzed. The results show that when inlet angle is 60°

it can make the most use of the gas-steam medium energy and the launcher temperature is more uniform. Moreover

under the condition of the same water quantity

slow water injection can obtain short time out of tube but its acceleration is larger; on the contrary

quick water injection enables steady launching but the time out of tube is longer. The result can provide reference for gas-steam ejection power system design.