基于SPH方法的射流撞击仿真  

Simulation on Jet Impingement Based on SPH Method

作　　者：强洪夫[1] 刘虎[1] 陈福振[1] 韩亚伟[1] 

机构地区：[1]第二炮兵工程学院动力工程系,陕西西安710025

出　　处：《推进技术》2012年第3期424-429,共6页Journal of Propulsion Technology

基　　金：国家教育部NCET资助项目;国家"九七三"项目(61310);第二炮兵工程学院创新性探索研究资助项目(EPXY0806)

摘　　要：为了研究液体推进剂的撞击雾化问题,采取光滑粒子流体动力学方法 (SPH)进行了射流撞击形成液膜过程的数值模拟。修正了基于连续表面力模型的表面张力算法,推导了考虑粘性与表面张力作用的SPH形式的控制方程,对撞击雾化模型进行了合理简化,采用水作为推进剂模拟液。得到了不同撞击速度、角度下的液膜图像及液膜的形成过程图像。证明了SPH方法适于解决存在自由表面及大变形的射流撞击问题。Formation of liquid sheet is the first and the key step of propellant jet impingement.An exploratory simulation research on jet impingement was made using SPH（Smoothed Particle Hydrodynamics） method.The surface tension algorithm based on CSF（Continuum Surface Force） model was revised using a modified SPH scheme.And the control equations in SPH form including the effect of viscosity and surface tension were deduced.Water was used as the simulation liquid,and the simplified computational model was evolved from like-on-like impinging jet injector.Simulation results of liquid sheets formed by different impinging velocities and angles show an agreement with analysis and experimental results,which proves SPH method a way to deal with jet impingement efficiently.For the effects of jet injectors and aerodynamic,there are still many issues which call for further work.

关 键 词：液体火箭推进剂 光滑粒子流体动力学 射流撞击 液膜 仿真 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]