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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering >An adaptive moving mesh method with application to non-stationary hypersonic flows in the atmosphere
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An adaptive moving mesh method with application to non-stationary hypersonic flows in the atmosphere

机译：自适应移动网格方法及其在大气非平稳高超声速流中的应用

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摘要

A numerical algorithm based on a shock-capturing scheme on adaptive moving meshes is described. Three-dimensional dynamical adaptive meshes are generated as the result of solving a variational problem. The governing equations are solved in a moving coordinate system therefore the method does not require any interpolation of the solution from one mesh onto another one. The developed algorithm can efficiently be used for the simulation of non-stationary supersonic flows in the atmosphere. As an example, it is applied to the study of the Tunguska meteorite hypersonic impact. For the first time this problem is modelled from the entrance moment up to the interaction with the Earth atmosphere in a three-dimensional formulation. A reasonable correspondence with the data of the observations is obtained. The implementation of the developed numerical algorithm reduces the computational time by the factor of four.
机译：描述了一种基于振动捕捉方案的自适应运动网格数值算法。解决变化问题的结果是生成了三维动态自适应网格。控制方程是在移动坐标系中求解的，因此该方法不需要从一个网格到另一个网格的解的任何插值。所开发的算法可以有效地用于模拟大气中的非平稳超声速流动。例如，它被应用于通古斯陨石高超音速冲击的研究。该问题首次以三维公式模拟了从入射时刻到与地球大气的相互作用。获得与观测数据的合理对应。所开发的数值算法的实现将计算时间减少了四倍。

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