网格对高超声速钝头体表面热流数值模拟结果的影响
收稿日期: 2021-11-29
修回日期: 2021-12-26
录用日期: 2022-01-20
网络出版日期: 2022-01-26
基金资助
国家自然科学基金(11562012)
Effect of grid strategy on numerical simulation results of aerothermal heating loads over hypersonic blunt bodies
Received date: 2021-11-29
Revised date: 2021-12-26
Accepted date: 2022-01-20
Online published: 2022-01-26
Supported by
National Natural Science Foundation of China(11562012)
马崇立 , 刘景源 . 网格对高超声速钝头体表面热流数值模拟结果的影响[J]. 航空学报, 2023 , 44(5) : 126710 -126710 . DOI: 10.7527/S1000-6893.2022.26710
Accurate prediction of aerothermal heating load over hypersonic blunt bodies is of great significance to the design of hypersonic vehicle thermal protection, while grid metric affects the prediction accuracy of aircraft surface heating load. By theoretical analysis and numerical simulation, a grid generation method is proposed according to the cell Reynolds number and freestream Reynolds number, respectively, based on the wall parameters and characteristic length of blunt bodies, and the reference value range of the cell Reynolds number based on wall parameters is also provided. The proposed grid generation method is then applied to the simulation of hypersonic aeroheating computations over semi-cylinders and semi-spheres under different incoming flow conditions. The results show that the proposed grid generation method and the suggested range of the cell Reynolds number based on wall parameters can satisfy the precision requirement of thermal environment simulation over hypersonic blunt bodies, facilitate the rational distribution of grids, and simultaneously improve the efficiency of numerical calculations.
Key words: hypersonic flow; aerothermal heating; blunt body; error analysis; grid metric
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