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| 定常压力梯度边界层相干结构的直接数值模拟 | |
| 引用本文： | 李兆瑞,陆利蓬,张强.定常压力梯度边界层相干结构的直接数值模拟[J].北京航空航天大学学报,2003,29(4):321-326. |
| 作者姓名： | 李兆瑞 陆利蓬 张强 |
| 作者单位： | 1. 北京航空航天大学 动力系; 2. 中国科学院 力学研究所非线性连续介质力学开放实验室 |
| 基金项目： | 国家自然科学基金;10172016; |
| 摘 要： | 根据流动稳定性理论,将不稳定波的一个周期作为相干结构的初值,采用直接数值模拟方法对有压力梯度湍流边界层中相干结构的演化进行了研究,得出其各种特性的变化与实验观测到的结果一致. |
| 关 键 词： | 湍流边界层 压力梯度 数值模拟 波 |
| 文章编号： | 1001-5965(2003)04-0321-06 |
| 收稿时间： | 2002-01-11 |
| 修稿时间： | 2002年1月11日 |
Direct Numerical Simulation of Coherent Structures in a Boundary Layer with Steady Pressure Gradients |
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| Li Zhaorui,Lu Lipeng,Zhang Qiang.Direct Numerical Simulation of Coherent Structures in a Boundary Layer with Steady Pressure Gradients[J].Journal of Beijing University of Aeronautics and Astronautics,2003,29(4):321-326. | |
| Authors: | Li Zhaorui Lu Lipeng Zhang Qiang |
| Institution: | 1. Dept. of Propulsion, Beijing University of Aeronautics and Astronautics; 2. Institute of Mechanics Laboratory for Nonlinear Mechanics of Continuous Media, Chinese Academy of Sciences |
| Abstract: | By using the method of direct numerical simulation(DNS), evolution of coherent structures in the wall region of a turbulent boundary layer with three different pressure gradients was studied. Initial values of the coherent structures in the wall region were obtained on the basis of the idea of resonant triad in the theory of hydrodynamic stability. It was found that the results of DNS match with those of the experiments very well in many aspects. The effects of pressure gradient on coherent structure were obtained by comparing the results of three different cases. |
| Keywords: | turbulent boundary layer pressure gradient numerical simulation wave |
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