| 高速运动弹丸诱导的瞬态流场数值研究 |
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| 引用本文： | 姜孝海,范宝春,李鸿志.高速运动弹丸诱导的瞬态流场数值研究[J].航空动力学报,2008,23(9):1579-1584. |
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| 作者姓名： | 姜孝海 范宝春 李鸿志 |
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| 作者单位： | 南京理工大学瞬态物理国家重点实验室,南京,210094 |
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| 摘 要： | 采用基于任意拉格朗日欧拉(ALE)方程的动网格及嵌入网格法,结合二阶精度Roe格式和沉浸边界法,对弹丸由高压气体驱动从静止状态加速至超声速,射出膛口到完全飞离初始流场的整个过程进行了数值模拟.根据数值结果,详细讨论了初始流场、火药燃气流场的形成与发展以及与弹丸的耦合和相互作用过程.
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| 关 键 词： | 任意拉格朗日欧拉(ALE)方程 二阶Roe方法 沉浸边界法 膛口流场 动力学过程 |
| 收稿时间： | 8/22/2007 9:47:13 AM |
| 修稿时间： | 2007/12/11 0:00:00 |
Numerical Investigation on the transient flow induced by a high-speed projectile |
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| JIANG Xiao-hai,FAN Bao-chun and LI Hong-zhi.Numerical Investigation on the transient flow induced by a high-speed projectile[J].Journal of Aerospace Power,2008,23(9):1579-1584. |
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| Authors: | JIANG Xiao-hai FAN Bao-chun and LI Hong-zhi |
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| Institution: | National key lab of transient physics,Nanjing University of science and technology,National key lab of transient physics,Nanjing University of science and technology |
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| Abstract: | The entire process of the quiescent projectile accelerated by high-pressure gas to shoot out at a supersonic speed and fly out of the range of precursor flow field was simulated numerically.The calculation method was based on arbitrary Lagrangian-Eulerian equations and second-order precision Roe method by adopting the chimera grids,dynamic mesh and immersed boundary method.From the predicted results,the coupling and interaction process among the precursor flow field,propellant gas flow field and the high-speed projectile were discussed in detail. |
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| Keywords: | ALE(arbitrary Lagrangian-Eulerian) equation second-order precision Roe method high-speed projectile immersed boundary method muzzle flow dynamic process |
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