进气角与注水规律对燃气-蒸汽弹射的影响

为了研究弯管进气角和注水规律对燃气-蒸汽弹射过程中流场和内弹道的影响,采用Mixture多相流模型，Renormalization group (RNG) k-ε湍流模型和动网格技术,建立了燃气-蒸汽弹射数值模型.通过与文献数据的对比,验证了数值方法的可靠性,分析了注水规律与弯管进气角度对燃气-蒸汽弹射过程流场和内弹道的影响.研究结果表明:当弯管进气角为60°时,燃气-蒸汽介质的能量能得到最大利用,发射筒内的温度分布较均匀；另外在同样的注水量下,缓慢注水导弹出筒时间相对较短,但波动较大；快速注水导弹运动平稳,但出筒时间较长.结果可为导弹燃气-蒸汽弹射动力系统的设计提供参考. 

Influence of inlet angle and injection water law on gas-steam ejection

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.