Numerical simulations of supersonic mixing layers with IPDG method

被引：0
|
作者：
Wang X. [1 ]
Liu W. [2 ]
Zhao M. [1 ]
Liu Z. [1 ]
机构：
[1] Mechanical Department, School of Mechanical Engineering, Tianjin University, Tianjin
[2] School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2021年 / 36卷 / 02期
关键词：
Convective Mach numbers; Discontious Galerkin finite element numerical method; Interior penalty method; Mesh adaptivity; Supersonic mixing layer;
D O I：
10.13224/j.cnki.jasp.2021.02.006
中图分类号：
学科分类号：
摘要：
In order to satisfy the high-precision simulation of supersonic mixing layers, discontinuous Galerkin finite element numerical method based on internal penalty method (IPDG) was realized. The viscous flux was introduced as an auxiliary variable to reduce the Navier-Stokes equation order, the discontinuous Galerkin method was used for spatial discretization and the Newton-Krylov implicit method was used for time marching. Compared with the finite volume method, the numerical accuracy of the method was improved to the third-order. The numerical simulation of the supersonic mixing layers developed in two-dimensional planar space with a convective Mach number of 0. 2 was carried out, and the reliability of the method was verified by comparison with the experimental data. The numerical results clearly indicated the development of flow transition and vortices in the mixing layer. Meanwhile, the adaptive mesh technology based on numerical solution error distribution was combined with IPDG method. The comparison showed that the number of adaptive grids was reduced by 9 times, and the calculation time was reduced by 8 times, thus significantly improving the calculation efficiency of the method. © 2021, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：275 / 283
页数：8
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