| 并行建表化学加速算法研究及其在气相斜爆轰模拟中的应用 |
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| 引用本文： | 吴锦涛,吕一品,董刚,王帅,唐科. 并行建表化学加速算法研究及其在气相斜爆轰模拟中的应用[J]. 气体物理, 2022, 7(1): 9-21. DOI: 10.19527/j.cnki.2096-1642.0891 |
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| 作者姓名： | 吴锦涛 吕一品 董刚 王帅 唐科 |
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| 作者单位： | 1.北京宇航系统工程研究所, 北京 100076 |
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| 基金项目： | 国家自然科学基金(11702032);一院CALT基金项目(CALT2020-ZD01)。 |
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| 摘 要： | 采用详细化学反应机理对气相斜爆轰问题开展数值计算时,由于组分之间的特征时间尺度相差很大,反应源项的直接积分(direct integration,DI)求解通常存在强烈的刚性及非线性现象,导致计算量很大.为了在不损失计算精度的基础上有效减少化学反应过程的计算时间,针对包含2H2+O2详细机理的二维斜爆轰并行计算,提出两...
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| 关 键 词： | 并行建表化学加速算法 斜爆轰 详细化学反应机理 数值模拟 化学热力学状态 |
| 收稿时间： | 2020-11-25 |
Parallel Chemistry Acceleration Algorithms and Application in Numerical Simulations of Gaseous Oblique Detonation Wave |
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| WU Jin-tao,LYU Yi-pin,DONG Gang,WANG Shuai,TANG Ke. Parallel Chemistry Acceleration Algorithms and Application in Numerical Simulations of Gaseous Oblique Detonation Wave[J]. Physics of Gases, 2022, 7(1): 9-21. DOI: 10.19527/j.cnki.2096-1642.0891 |
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| Authors: | WU Jin-tao LYU Yi-pin DONG Gang WANG Shuai TANG Ke |
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| Affiliation: | 1.Beijing Institute of Astronautical System Engineering, Beijing 100076, China2.Beijing Institute of Electronic System Engineering, Beijing 100854, China3.Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China |
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| Abstract: | In the numerical simulations of oblique detonation wave with the detailed chemical reaction mechanism,the computation of chemical reactions costs a large amount of CPU time due to the stiffness and non-linearity.To decrease the computational costs for the chemistry computation,a series of parallel chemistry acceleration algorithms based on the reduced in situ adaptive tabulation(ISAT)method were proposed for simulations of transient compressible reacting flows.These algorithms were applied in two-dimensional 2H2+O2 gaseous oblique detonation computations to identify the computational performances of chemistry acceleration.Compared with the computational results by direct integration(DI),all the parallel chemistry acceleration algorithms can improve the computational efficiency of chemical reactions without the loss of computational accuracy.The maximum speedup ratio of 3.71 is obtained for the purely transposed processing(TP)algorithm.The analyses also indicate that the selection on the parallel strategies could influence the computational efficiency,which essentially is dominated by the scatter distribution rules of chemical thermodynamic states in the accessed region and the repeatable region. |
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| Keywords: | parallel chemistry acceleration algorithm oblique detonation wave detailed chemical reaction mechanism numerical simulation chemical thermodynamic state |
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