北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (11): 2199-2206.doi: 10.13700/j.bh.1001-5965.2019.0129

• 论文 • 上一篇    下一篇

低速修正的可压缩求解器对湍流模拟精度的影响

李彦苏1,2, 张坤1, 何承军1, 阎超2   

  1. 1. 北京机电工程研究所, 北京 100074;
    2. 北京航空航天大学 航空科学与工程学院, 北京 100083
  • 收稿日期:2019-03-27 出版日期:2019-11-20 发布日期:2019-11-30
  • 通讯作者: 李彦苏.E-mail:yansu_li@126.com E-mail:yansu_li@126.com
  • 作者简介:李彦苏 女,博士,工程师。主要研究方向:计算流体力学。

Effect of low-speed modification of compressible solver on turbulence simulation accuracy

LI Yansu1,2, ZHANG Kun1, HE Chengjun1, YAN Chao2   

  1. 1. Beijing Electro-Mechanical Engineering Institute, Beijing 100074, China;
    2. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China
  • Received:2019-03-27 Online:2019-11-20 Published:2019-11-30

摘要: 修正可压缩求解器能提高其对高速湍流中低速区的模拟精度,但低速修正效果受到求解器、计算格式精度、网格量等多因素影响,难以直接评估。研究了不同阶数、分辨率、网格量下,有无低速修正的可压缩求解器对复杂湍流模拟的影响。通过泰勒-格林涡算例,定量分析了不同结果的差异。结果表明:不同网格量、计算方法组合下,低速修正对结果的影响不同。网格量较小、重构格式精度较低的情况下,低速修正方法能够有效提高计算精度。

关键词: 可压缩湍流, 低速修正, 高精度格式, 全速域格式, 泰勒-格林涡

Abstract: The calculation accuracy of low-speed region in high speed turbulence can be improved by modifying the compressible solver. However, it is difficult to evaluate the contribution of such modification, because simulation accuracy results from complex factors including solver type, accuracy of schemes, grid number, etc. This paper focuses on the influence of the compressible solver with and without low-speed modification on complex turbulence simulation when using different order or resolution of the schemes and different amount of grid. With the calculation example of Taylor-Green vortex, the differences of the results are evaluated quantitatively. The results show that the influence of the low-speed modification is different with different scheme-grid combinations. The low-speed modification method can effectively improve the calculation accuracy with coarse grids and low-accuracy reconstruction schemes.

Key words: compressible turbulence, low-speed modification, high-accuracy schemes, all-speed schemes, Taylor-Green vortex

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