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| Application of unstructured hybrid grid on the aerothermodynamics prediction for calibration model |
| Received:September 24, 2020 Revised:December 16, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20200924001 |
| KeyWord:unstructured hybrid grid aerothermodynamics numerical simulation calibration model |
| Author | Institution |
| 张培红 |
中国空气动力研究与发展中心 计算空气动力研究所, 绵阳 |
| 张耀冰 |
中国空气动力研究与发展中心 计算空气动力研究所, 绵阳 |
| 赵炜 |
中国空气动力研究与发展中心 计算空气动力研究所, 绵阳 |
| 周桂宇 |
中国空气动力研究与发展中心 计算空气动力研究所, 绵阳 |
| 吴晓军 |
中国空气动力研究与发展中心 计算空气动力研究所, 绵阳 |
| 杨福军 |
中国空气动力研究与发展中心 计算空气动力研究所, 绵阳 |
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| Abstract: |
| An unstructured hybrid grid eliminates the structural constraints of nodes for a structured grid,so it can deal with the boundary well.At the same time,it takes into account the needs of viscous boundary layer simulation,and has the advantages of flexibility,strong adaptability to complex shapes and short generation time.It has been widely used in the simulation of aircraft aerodynamics.According to the characteristics of unstructured grids,the improved methods of gradient calculation and entropy correction of Roe scheme,which were developed for high-precision aerodynamic analysis using an unstructured hybrid grid in the previous stage,are extended to the numerical simulation of aerothermodynamics.Taking the hypersonic flow around the blunt cone calibration model as the research object,the effects of different grid forms and the first layer mesh distance are studied.The research results show that:when calculating aerothermodynamics,it is best to use the quadrilateral mesh or triangular mesh obtained by cross dividing quadrilateral mesh,and the normal grid Reynolds number of the surface is about 20.The research provides guidance for the generation of unstructured hybrid grids in aerothermodynamics prediction,and verifies the effectiveness and reliability of the calculation methods. |
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