摘要
导弹垂直热发射过程中,高温高速燃气射流会对周围结构产生强烈的冲击烧蚀,影响发射系统的稳定性和安全性。排导技术是实现箱式垂直热发射的关键技术之一。作为影响反喷流产生的上游机构,导流器的几何结构直接影响燃气流的排导效率和发射系统的通用性。基于计算流体力学方法,研究了不同型面导流器对燃气流排导和发射箱内环境的影响。建立了某箱式双联装垂直热发射系统三维流场模型并进行了网格划分,对网格无关性进行了验证;利用缩比实验验证了计算模型的有效性。结果表明,与斜平面导流器相比,圆弧型导流器对燃气流向上排导起抑制作用,在燃气流冲击下其压强和温度更低;圆弧型导流器中反喷现象减弱,发射箱内热环境有所改善,弹体结构受到的热冲击更低。
During the thermal vertical launching of the missile,the high-temperature and high-speed jet will have a strong impact on the surrounding structure,which will affect the stability and safety of the launching system.Exhaust conduction technology is one of the key technologies for achieving box-type vertical thermal launching.As an upstream mechanism that affects the generation of counter-jet,the geometry of the deflector directly affects the efficiency of the discharge of the jet and the versatility of the launching system.Therefore,based on the computational fluid dynamics method,the influence of different profile deflectors on the jet flow discharge and the environment inside the launching box were researched.The three-dimensional flow field model of a box-type double-mounted vertical heat-emitting system was established and meshed,and the grid independence was verified.The validity of the calculation model was verified by the scaling experiment.The results show that compared with the plane deflector,the arc deflector suppresses the upward discharge of the jet flow,and the pressure and temperature are lower under the impact of the jet flow.The phenomenon of reverse jet in the arc deflector is decreased,the environment inside the launching box is improved,and the thermal shock of the projectile structure is lower.
作者
赵若男
姜毅
李静
胡东
ZHAO Ruonan;JIANG Yi;LI Jing;HU Dong(School of Astronautics,Beijing Institute of Technology,Beijing 100081,China)
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2020年第5期671-678,共8页
Journal of Solid Rocket Technology
