| 引用本文: | 范晓樯,李桦,李晓宇,等.超声速飞行器流场的并行数值计算及效率分析.[J].国防科技大学学报,2006,28(3):1-4.[点击复制] |
| FAN Xiaoqiang,LI Hua,LI Xiaoyu,et al.Parallel Numerical Simulation and Efficiency Analysis of the Flow Field of Supersonic Vehicle[J].Journal of National University of Defense Technology,2006,28(3):1-4[点击复制] |
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| 超声速飞行器流场的并行数值计算及效率分析 |
| 范晓樯, 李桦, 李晓宇, 贾地 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 基于有限体积方法、TVD差分格式和显式Runge-Kutta迭代方法的框架，针对超声速/高超声速飞行器绕流流场，在超级并行计算机上完成了2～64个CPU并行数值计算工作。通过测试程序在超级计算机上的并行效率，并将并行程序应用于航天飞机绕流流场计算，检验了计算程序进行大规模并行计算的性能。结果表明，在负载平衡的条件下，程序在该超级并行计算机上达到了不同程度的超线性加速比，并行效率最高达到了126%，远远高于微机Cluster并行平台上的结果，适合复杂流场的大规模并行计算。 |
| 关键词: 数值模拟 并行计算 高超声速 流场 |
| DOI： |
| 投稿日期：2006-01-09 |
| 基金项目:国家863高技术计划资助项目 |
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| Parallel Numerical Simulation and Efficiency Analysis of the Flow Field of Supersonic Vehicle |
| FAN Xiaoqiang, LI Hua, LI Xiaoyu, JIA Di |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Based on the finite volume method (FVM), OC-TVD scheme and Runge-Kutta method, parallel numerical simulation of the flow field around the hypersonic/supersonic vehicle was performed on a super computer. The parallel computation efficiency was tested with the CPU nodes varied form 2 to 64. The program was tested for its parallel efficiency on the super computer and was applied to the calculation of the flow field around space shuttle. In this way, the large-scale parallel calculating capacity of the program was examined. The results indicate that, given that the load is balanced, the parallel computation on the super computer reaches super-linear speedup. The maximum efficiency ratio reaches 126%, which is far larger than the value on PC cluster parallel platform. |
| Keywords: numerical simulation parallel computation hypersonic flow field |
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