水下固体火箭发动机推力特性研究  

Study on the Thrust Characteristics of the Underwater Solid Rocket Motor

作　　者：唐嘉宁[1] 刘向阳[2] 李世鹏[2] 王宁飞[2] 

机构地区：[1]中国兵器科学研究院,北京100089 [2]北京理工大学宇航学院,北京100081

出　　处：《导弹与航天运载技术》2012年第5期15-21,共7页Missiles and Space Vehicles

基　　金：国家自然科学基金(11072032)

摘　　要：为研究水下固体火箭发动机的推力特性,采用CFD方法分析高速燃气射流与周围水环境之间的相互作用机理及多相流流场结构对发动机推力的影响,并对不同水深、不同燃烧室压强以及不同喷管扩张比情况下的推力变化规律进行讨论。研究发现:水下火箭发动机推力振荡剧烈,间歇性的推力脉冲是由气体射流的颈缩/断裂现象引起的;喷管设计出口压强与环境压强之比是判断推力振荡特性的重要参数,该压强比增大时,振荡频率减小、振荡幅值升高。To investigate the thrust characteristics of underwater solid rocket motor, CFD is used to analyze the interactions of high-speed gas jet and its surrounding water and the effect multiphase flow on the motor thrust. The thrust laws of motors at different conditions including different depth, different chamber pressure and different expansion ratio are discussed. The study indicates that the strong and intermittent thrust pulses of the underwater rocket motor is caused by the necking/breaking of gas jet. The oscillatory thrust is evaluated based on the ratio between nozzle exit pressure and environment pressure, with higher ratio causing lower oscillation frequency and higher oscillation amplitude.

关 键 词：水下固体火箭发动机 推力 水下气体射流 多相流 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]