| 湍流边界层内流向涡的数值模拟研究 |
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| 引用本文： | 张楠,刘凯,陆利蓬. 湍流边界层内流向涡的数值模拟研究[J]. 工程热物理学报, 2006, 27(Z1): 85-88 |
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| 作者姓名： | 张楠 刘凯 陆利蓬 |
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| 作者单位： | 北京航空航天大学能源与动力工程学院,北京,100083 |
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| 摘 要： | 采用准二维共振三波作为湍流边界层近壁区相干结构初值,用直接数值模拟方法计算了流动从二维结构发展到三维结构并且伴随流向涡生成的整个过程,分析结果显示流向涡对湍流动能和质量传输有着重要作用,是湍流边界层相干结构的重要特征和运动形式.
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| 关 键 词： | 湍流边界层 流向涡 直接数值模拟 相干结构 共振三波 |
| 文章编号： | 0253-231X(2006)Suppl.1-0085-04 |
| 修稿时间： | 2006-01-25 |
NUMERICAL SIMULATION OF STREAMWISE VORTEX IN A TURBULENT BOUNDARY LAYER |
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| ZHANG Nan,LIU Kai,LU Li-Peng. NUMERICAL SIMULATION OF STREAMWISE VORTEX IN A TURBULENT BOUNDARY LAYER[J]. Journal of Engineering Thermophysics, 2006, 27(Z1): 85-88 |
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| Authors: | ZHANG Nan LIU Kai LU Li-Peng |
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| Abstract: | By using the method of direct numerical simulation,the production of the streamwise vortices and the process from quasi-2-dimensional to 3-dimensional coherent structures in the wall region of a turbulent boundary layer are simulated.The initial values of the quasi-2-dimensional coherent structures in the wall region are obtained on the basis of the idea of resonant triad waves in the theory of hydrodynamic instability.The results show that the streamwise vortices play an important role in the transfer of turbulent kinetic energy and mass,which are dominant motions of the coherent structures in a turbulent boundary layer. |
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| Keywords: | boundary layer streamwise vortex DNS coherent structure resonant triad waves |
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