| 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。 |
| 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 |
| DOI： |
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| 基金项目: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)。 |
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| Simulation on Jet Impingement Based on SPH Method |
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QIANG Hong-fu, LIU Hu, CHEN Fu-zhen, HAN Ya-wei
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Department of Power and Energy,The Second Artillery Engineering College,Xi’an 710025,China
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| Abstract: |
| 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. |
| Key words: Liquid rocket propellant Smoothed particle hydrodynamics Jet impingement Liquid sheet Simulation |
