| 近壁湍流相干结构传播速度的研究 |
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| 引用本文： | 陆昌根.近壁湍流相干结构传播速度的研究[J].南京航空航天大学学报,1999,31(3):258-262. |
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| 作者姓名： | 陆昌根 |
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| 作者单位： | 南京航空航天大学空气动力学系,南京,210016 |
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| 摘 要： | 近壁湍流相干结构传播速度的问题，目前尚无理论结果。本文利用流动稳定性理论中的共振三波概念建立单个相干结构模型，采用紧致有限差分和Ｆｏｕｒｉｅｒ谱展开相结合的方法对近壁湍流相干结构进行了数值模拟，计算得到的相干结构流向传播速度与直接数值模拟的结果一致。
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| 关 键 词： | 流动稳定性理论 有限差分法 湍流 相干结构 传播速度 |
Study on Propagation Velocity of Coherent Structure in Wall Region of a Turbulent Flow |
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| Lu Changgen.Study on Propagation Velocity of Coherent Structure in Wall Region of a Turbulent Flow[J].Journal of Nanjing University of Aeronautics & Astronautics,1999,31(3):258-262. |
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| Authors: | Lu Changgen |
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| Abstract: | Up till now there is no clear cut definition of theory for propagation velocity of coherent structure in wall region of a turbulent flow. A model of a single coherent structure is proposed, using the idea of resonant triad of theory of hydrodynamic stability. This paper investigates the coherent structure in the wall region of a turbulent flow by numerical simulation combining compact finite differences and Fourier spectral expansion. The calculated streamwise propagation velocity of the coherent structure agrees reasonally well with those of direct numerical simulation. |
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| Keywords: | hydrodynamic stability theory finite difference methods turbulence coherent structure propagation velocity |
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