Thermal radiation limiter based on angle-space discontinuous finite element

被引：0
作者：
Li S. [1 ]
Sun Y. [1 ,2 ]
Zheng A. [1 ]
Ma J. [3 ]
机构：
[1] Basic Research Center, School of Power and Energy, Northwestern Polytechnical University, Xi’an
[2] Center of Computational Physics and Energy Science, Yangtze River Delta Research Institute, Northwestern Polytechnical University, Jiangsu, Taicang
[3] Key Laboratory of Shaanxi Province for Development and Application of New Transportation Energy, School of Automobile, Chang’an University, Xi’an
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2022年 / 37卷 / 12期
关键词：
angle and space elements; Barth-Jespersen limiter; discontinuous and shielding effect; discontinuous Galerkin finite element; thermal radiation;
D O I：
10.13224/j.cnki.jasp.20210369
中图分类号：
学科分类号：
摘要：
Due to the irregular shape of the high-temperature hot components in the aero-engine, the heat radiation process has obvious discontinuous and shielding effects, and how to achieve accurate simulation of this process is a challenge. Using discontinuous finite element to discretize the angle and space domain in the radiation transfer equation, and based on the hierarchical limiting strategy, the Barth-Jespersen limiter was introduced in the angle and space domain to suppress the non-physical oscillation of the radiation intensity numerical solution in the angle and space. By comparing with the results of the finite volume method and the Monte Carlo method in the literature, the validity of the method was proved. In addition, by comparing with the angular analytical solution of radiation intensity, it was verified that the limiter can effectively suppress the numerical oscillation caused by the radiation discontinuity effect, and can eliminate the nonphysical solution of radiation intensity. The three-dimensional characterization of the radiation intensity in the angular domain at any spatial position was realized. © 2022 BUAA Press. All rights reserved.
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页码：2865 / 2874
页数：9
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