| 曲率对机翼边界层二次失稳影响 |
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| 引用本文： | 徐国亮,符松. 曲率对机翼边界层二次失稳影响[J]. 力学学报, 2010, 42(6): 995-1005. DOI: 10.6052/0459-1879-2010-6-lxxb2009-361 |
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| 作者姓名： | 徐国亮 符松 |
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| 作者单位： | 清华大学航天航空学院 |
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| 基金项目： | 国家自然科学基金资助项目(10932005)~~ |
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| 摘 要： | 采用非线性抛物化扰动方程(NPSE)计算了层流机翼NLF0415(2)在几个工况下横流涡的非线性发展, 应用Floquet理论分析了横流涡的二次失稳. 较系统地分析了后掠机翼在多种参数下表面曲率对其流动稳定性的影响. Haynes证明曲率对于横流在线性稳定性计算(LST)和非线性抛物化扰动方程计算中(NPSE)都起着非常明显的稳定作用; 然而, 该文计算结果表明, 曲率在二次失稳计算中影响不大.
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| 关 键 词： | 曲率 |
| 收稿时间： | 2009-06-09 |
| 修稿时间： | 2010-01-06 |
THE EFFECT OF CURVATURE ON THE SWEPT WING BOUNDARY LAYER SECONDARY INSTABILITY |
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| Xu Guoliang , Fu Song. THE EFFECT OF CURVATURE ON THE SWEPT WING BOUNDARY LAYER SECONDARY INSTABILITY[J]. chinese journal of theoretical and applied mechanics, 2010, 42(6): 995-1005. DOI: 10.6052/0459-1879-2010-6-lxxb2009-361 |
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| Authors: | Xu Guoliang Fu Song |
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| Affiliation: | School of Aerospace Tinghua university, Beijing 100084, China |
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| Abstract: | Using the Parabolized Stability Equations(PSE),the nonlinear evolution of Stationary crossflow vortices over a swept NLF0415(2) airfoil is studied,then Floquet theory is employed to systematically study the dependence of the secondary,high-frequency instabilities on the curvature at different conditions.Haynes (2000) shows that the curvature has a stabilizing effect for linear stability theory and nonlinear Parabolized Stability Equations,and the results show that the curvature has no effect for secondary l... |
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| Keywords: | nonlinear crossflow vortices secondary instability curvature |
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