喷水孔数量对燃气-蒸汽弹射内弹道的影响

摘要

To study the gas-steam ejection power water-chamber, the Mixture two-phase model, k-ε turbulent model and zone moving and dynamic layering method were adopted to study the influence of water-spout number on the gas-steam interior-ballistics. The results show that,as the water-spout number increasing,the gas drag into bend tube and launch tube increases,and the water work-out time in ejection device decreases,and the maximum pressure peak during the ejection reduces. The water-spout number has a strong influence on the launch tube temperature from 0.1 s to 0.4 s,while it has little influence on tube temperature after 0. 55 s. For the water-spout number increasing, the missile ejection power decreases,and the tube-outlet time of missile delays,and the tube-outlet velocity decreases. The research can provide theoretical basis for the water injection design of gas-steam ejection.%以含水室的燃气-蒸汽弹射动力装置为研究对象,采用Mixture两相流模型、k-ε湍流模型和域动分层动网格技术,研究了不同喷水孔数量对燃气-蒸汽弹射内弹道的影响.研究表明:随着喷水孔数量的增加,燃气进入弯管和发射筒内阻力逐渐增大,弹射装置内冷却水消耗完的时间逐渐缩短,弹射过程中的最大压力峰值逐渐降低.同时,喷水孔的数量对0.1~0.4 s时间内的发射筒内的温度影响较大,对0.55 s以后发射筒内的温度影响较小.喷水孔数量的增加引起发射筒内混合气体动能的降低,导致导弹的出筒时间延长和导弹的出筒速度降低.研究结果为燃气-蒸汽弹射喷水方案设计提供了理论依据.