| 唐静,郑鸣,邓有奇,李彬.网格自适应技术在复杂外形流场模拟中的应用[J].计算力学学报,2015,32(6):752~757 |
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| 网格自适应技术在复杂外形流场模拟中的应用 |
| Grid adaptation for flow simulation of complicated configuration |
| 投稿时间：2014-08-06 修订日期：2014-11-07 |
| DOI：10.7511/jslx201506007 |
| 中文关键词: 网格自适应 复杂构型 红玉现象 激波 脱体涡 |
| 英文关键词:grid adaptation complicated configuration carbuncle shock detached vortex |
| 基金项目: |
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| 摘要点击次数: 1693 |
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| 中文摘要: |
| 建立了一套适用于非结构混合网格自适应方法,针对激波和涡的不同特征采用不同加密探测器,各向异性加密棱柱单元并沿物面法向方向剖分所有棱柱层,各向异性剖分四面体单元,并保证四面体与棱柱交界面上网格协调。构造Hermit插值近似投影物面新加网格点和基于Laplacian光滑方法对空间网格进行优化。通过网格自适应加密,使用Roe格式计算高超声速球头绕流的红玉现象得到明显减轻。F16飞机含激波和脱体涡的流场自适应计算表明,网格加密集中在激波面和涡核附近区域,激波和涡计算更准确。 |
| 英文摘要: |
| The adaptation system for unstructured mixed grid is established in this paper.The different detectors designed for flows with different characters.The strategies of subdividing all layers of prism cells in normal direction and anisotropically subdividing tetra cells for viscous flow are more robust for complicated configuration.Carbuncle of Roe scheme for flow computation around sphere at high Mach number could be weakened by grid adaptation.The cases for F16 fighter including shock and vortex,respectively,indicate the refined grid cells locate near shock surface and in the zone including vortex core.After refinement,the patterns of shock and vortex are much more clarity,and the pressure calculated at vortex core is much more accurate. |
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