推进剂供应管路内液体瞬变流一维有限元计算  

One-dimensional finite element solutions for liquid transients in propellant feedlines

作　　者：程谋森[1] 刘昆[1] 张育林[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《推进技术》2000年第4期12-15,共4页Journal of Propulsion Technology

摘　　要：将液路计算中偏微分方程模型化成有限阶数的常微分方程组 ,由一维液体瞬变管流方程的特征线差分格式 ,提出了一种计算管腔互联结构形式的液体推进剂供应管路中瞬变流的一维有限元方法 ,它兼有特征线方法的特点。数值计算表明对单根等截面圆管阀门关断问题的计算结果与特征线方法计算结果吻合。利用本文方法计算了一个模型发动机的脉冲工况动态过程 ,取得了很好的效果。A one-dimensional finite element solution for liquid transients in propellant feedlines composed of vessels and ducts was derived. The solution was based on the difference scheme of characteristics and combined with the merits of finite element method. The calculated results for the approximation of valve closure problems show good agreement with that obtained by method of characteristics. The pulse mode of a model thruster was simulated with this solution, and the results were reasonable.

关 键 词：液体推进剂火箭发动机 推进剂输送 瞬变流计算 

分 类 号：V434.1[航空宇航科学与技术—航空宇航推进理论与工程] V421.42