| Citation: | LI Yansu, ZHANG Kun, HE Chengjun, et al. Effect of low-speed modification of compressible solver on turbulence simulation accuracy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(11): 2199-2206. doi: 10.13700/j.bh.1001-5965.2019.0129(in Chinese)
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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.
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