| 基于混合网格Navier-Stokes方程的并行隐式计算方法研究 |
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| 引用本文： | 郑冠男,邓守春,韩同来,杨国伟.基于混合网格Navier-Stokes方程的并行隐式计算方法研究[J].应用力学学报,2011,28(3). |
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| 作者姓名： | 郑冠男 邓守春 韩同来 杨国伟 |
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| 作者单位： | 1. 中国科学院力学研究所高温气体动力学重点实验室,100190北京
2. 西北工业大学能源与动力学院,710068西安 |
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| 摘 要： | 针对结构网格很难处理复杂外形和非结构网格无法计算具有边界层的粘性流动的缺点,发展了基于混合网格格点的隐式算法,成功地解决了在工程应用中难于处理的复杂外形粘性流场计算和效率问题。同时针对大规模的工程问题,发展了基于MPI通信技术的染色分层通讯并行计算方法。其中空间离散采用基于Roe格式发展的三阶迎风HLLEW(Harten-Lax-Van Leer-Einfeldt-Wada)或AUSM格式,湍流模型采用k??两方程湍流模型,时间推进考虑到LU-SGS并行等效较困难则采用基于DP-LUR(Data-Parallel Lower-Upper Relaxation)格式的隐式算法,计算CFL数可取到105量级,从2个到128个CPU的并行加速效率都保持在90%以上,大大提高了计算效率。算例对标模M6机翼模型流场进行计算,验证了方法的可靠性;然后对标模DLR-F6翼身组合体进行混合网格粘性与无粘计算结果进行比较,进一步验证混合网格方法;最后计算了DLR-WBNP外挂发动机翼身组合体模型,准确模拟了外挂和超临界机翼的相互干扰流动问题,采用4 CPU 16 CORE到24 CPU 96 CORE,2000步计算时间都不超...
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| 关 键 词： | 混合网格 k-ω两方程湍流模型 DP-LUR隐式方法 MPI 染色分层通讯 |
An implicit parallel computing method based on the Navier-Stokes equations with hybrid grids |
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| Zheng Guannan Deng Shouchun Han Tonglai Yang Guowei.An implicit parallel computing method based on the Navier-Stokes equations with hybrid grids[J].Chinese Journal of Applied Mechanics,2011,28(3). |
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| Authors: | Zheng Guannan Deng Shouchun Han Tonglai Yang Guowei |
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| Institution: | Zheng Guannan1 Deng Shouchun1 Han Tonglai2 Yang Guowei1(Key Laboratory of High Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Science,100190,Beijing,China)1(School of Power and Energy,Northwestern Polytechnical University,710068,Xi'an,China)2 |
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| Abstract: | To overcome the disadvantages that the complex shapes are difficult to generate the structured grid and the unstructured grid could not resolve the wall boundary layers for viscous flows,an implicit parallel computing method based on the Navier-Stokes equations with hybrid grids is studied.Parallel computing method based on coloration and packet communication using MPI is developed to solve the engineering problems with high computational cost.In the spatial discretization,the HLLEW(Harten-Lax-Van Leer-Einf... |
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| Keywords: | hybrid grid two equations turbulence models DP-LUR implicit time method MPI coloration and packet communication |
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