新型车载同心筒流场机理与热环境研究

Research on flow field mechanism and thermal environment of a new vehicle-carried concentric canister launcher

针对路基车载同心筒自力发射系统热环境评估与改善的问题,基于雷诺平均方程及二阶AUSM格式,依托弹性变形和域动分层结合的动网格技术,对不同结构的同心筒二维轴对称流场进行了非定常数值计算,分析了不同结构条件对流场机理及热环境特性的影响,列举了传统优化同心筒自力发射方案;提出了一种适宜路基发射环境的新型同心筒概念。对比的动态数值结果表明,和传统优化方案相比,该新型同心筒大大降低了导弹周围气体的温度,有力改善了高温燃气流进入内筒的"倒吸效应";倒吸进入内筒的低温气体对导弹起到了很好的气冷保护作用;低温气体和燃气混合,改善了外筒的热环境。

Based on the RANS governing equations,2nd-order AUSM scheme and dynamic mesh technology with spring based smoothing method,and laying based zone moving method,the axisymmetric flow fields of different shapes of concentric canister launcher（CCL）were simulated numerically. Both the flow field mechanism and missile thermal environment characteristics of different structure form were obtained to deal with the thermal environment evaluating and improving problem of vehicle-carried concentric canister launcher. The traditional optimization CCL schemes were enumerated,moreover,a new concept CCL which is suitable for vehicle-carried environment was proposed. The comparison of the numerical results show that compared to the traditional optimization CCL,the new concept CCL may lower the temperature of the gas around the missile significantly the＂reverse absorption effect＂of high temperature jet can be well inhibited;the inverted absorption cold gas into the internal canister plays a very good role in cooling down the missile and launch system;the thermal environment of external cylinder is also improved by the mixed gas of the jet and cryogenic gas.