| 无限展长后掠翼边界层定常横流不稳定转捩分析 |
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| 引用本文： | 蔡林峰,李昊歌,陈伟芳.无限展长后掠翼边界层定常横流不稳定转捩分析[J].计算物理,2019,36(2):175-181. |
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| 作者姓名： | 蔡林峰 李昊歌 陈伟芳 |
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| 作者单位： | 浙江大学航空航天学院,杭州,310027;浙江大学航空航天学院,杭州,310027;浙江大学航空航天学院,杭州,310027 |
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| 基金项目： | 国家自然科学基金（11572284，51575487）及国家自然科学基金重大科研仪器研制项目（6162790104）资助 |
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| 摘 要： | 采用γ-Reθt横流转捩拓展模型对NLF （2）-0415无限展长后掠机翼进行数值模拟，重点分析来流雷诺数、机翼表面粗糙度及后掠角对边界层横流不稳定性的影响.研究发现γ-Reθt横流转捩拓展模型能够准确预测边界层定常横流不稳定转捩，计算结果与试验数据吻合较好.结果表明来流雷诺数越大、机翼表面越粗糙，横流转捩位置越靠前；随着机翼后掠角的增加，转捩位置先前移随后逐渐靠后.
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| 关 键 词： | 后掠机翼 边界层 横流转捩 k-ω SST湍流模型 y-Reθt转捩模型 |
| 收稿时间： | 2018-01-10 |
| 修稿时间： | 2018-03-13 |
Analysis of Steady Cross-flow Instability Transition in Infinite Swept Wing Boundary Layer |
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| CAI Linfeng,LI Haoge,CHEN Weifang.Analysis of Steady Cross-flow Instability Transition in Infinite Swept Wing Boundary Layer[J].Chinese Journal of Computational Physics,2019,36(2):175-181. |
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| Authors: | CAI Linfeng LI Haoge CHEN Weifang |
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| Institution: | School of Aeronautics and Astronauts, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | γ-Reθt crossflow extension model was applied to conduct numerical simulation of crossflow transition on NLF(2)-0415 infinite swept wing. Effects of Reynolds number, surface roughness, sweep angle on crossflow instability of 3-D boundary layer were studied mainly. It found that γ-Reθt crossflow extension model predicts 3-D boundary layer transition correctly and calculation results agree well with experiment data. It shows that with increase of Reynolds number or surface roughness, location of crossflow transition onset moves forward. However, with increase of sweep angle, location of crossflow transition onset moves forward firstly and then moves back. |
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| Keywords: | swept wing boundary layer crossflow transition k-ω SST turbulence model γ-Reθt transition model |
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