An in-depth numerical investigation of a supersonic cavity-ramp flow with DDES method
An in-depth numerical investigation of a supersonic cavity-ramp flow with DDES method
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采用 DDES 方法对超声速空腔斜坡流进行深入数值研究
DOI:
10.1016/j.ast.2019.03.055
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发表时间:
2019-06
影响因子:
5.6
通讯作者:
李椿萱
中科院分区:
文献类型:
--
作者:
吴正园;高振勋;蒋崇文;李椿萱
Delayed detached eddy simulation (DDES) studies of the highly unsteady supersonic cavity-ramp flow have been successfully carried out. It is generally believed that accurate prediction of the compressible unstable shear layer coupled with the followed reattaching process is a big challenge for DDES method. In the current DDES studies based on an engineering affordable mesh, significant improvements are achieved assessed by the agreements with experimental data. Effects of various crucial parameters related to DDES have been analyzed in detail. First of all, it is found that a fine mesh with sufficient computation domain is required to obtain accurate results, and the time step needs to be properly set. Secondly, effect of the definition of subgrid length scale Δ is observed, especially in the initial region of shear layer. The original Δ form of DDES method tends to depress the development of instabilities in the shear layer. Analysis on the physical causes is presented. Moreover, unexpected performance of DDES'shield function f d for the current case is observed and analyzed, whose influence on the simulated characteristic in the downstream region has also been discussed in particular.
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影响因子:
5.7
作者:
R. Zhao;Chao Yan;Jian Yu;Xinliang Li
通讯作者:
R. Zhao;Chao Yan;Jian Yu;Xinliang Li
影响因子:
1.6
作者:
Chen Fan;X. Xiao;J. Edwards;H. Hassan;R. Baurle
通讯作者:
Chen Fan;X. Xiao;J. Edwards;H. Hassan;R. Baurle
DOI:
10.1007/s11431-013-5349-4
发表时间:
2013-09
期刊:
Science China Technological Science
影响因子:
--
作者:
Gao Zhenxun;Jiang Chongwen;Lee Chun-Hian
通讯作者:
Lee Chun-Hian
DOI:
10.2514/6.2008-6923
发表时间:
2008
期刊:
--
影响因子:
--
作者:
D. Peterson;G. Candler
通讯作者:
D. Peterson;G. Candler
DOI:
10.2514/6.2018-3727
发表时间:
2018-06
期刊:
2018 Fluid Dynamics Conference
影响因子:
--
作者:
Peixu Guo;Zhenxun Gao;Chongwen Jiang;Chunhian Lee
通讯作者:
Peixu Guo;Zhenxun Gao;Chongwen Jiang;Chunhian Lee