| 水轮机通流部件表面磨损波纹与湍流边界层中的不稳定波 |
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| 引用本文： | 黄社华,程良骏.水轮机通流部件表面磨损波纹与湍流边界层中的不稳定波[J].华中科技大学学报(自然科学版),1994(11). |
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| 作者姓名： | 黄社华 程良骏 |
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| 作者单位： | 华中理工大学电力工程系 |
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| 摘 要： | 应用小扰动理论对近壁湍流粘性子层中的流动进行了稳定性分析，通过讨论其与湍流核心区相于结构的关系，提出一个简化的湍流相干结构模式即小扰动作用下近似连续分布的Ｋｅｌｖｉｎ－Ｈｅｌｍｈｏｌｔｚ涡层的不稳定波状运动结构；运用此模式简要分析了稀疏颗粒在湍流边界层中的运动。结果表明，相干结构对颗粒的运动及磨损波纹的形成起了支配性的作用。
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| 关 键 词： | 固液两相湍流 磨损波纹 用于结构 不稳定波 |
The Relation between Erosion Ripples on the Wetted Surface of Hydraulic Turbine and Instability Wavesin the Turbulent Boundary Layer |
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| Huang ShehuaDept.of Elec,Power Eng.,H,U,S. T,Wuhan ,China., Cheng Liangjun.The Relation between Erosion Ripples on the Wetted Surface of Hydraulic Turbine and Instability Wavesin the Turbulent Boundary Layer[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1994(11). |
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| Authors: | Huang ShehuaDeptof Elec Power Eng H U S T Wuhan China Cheng Liangjun |
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| Institution: | Huang ShehuaDept.of Elec,Power Eng.,H,U,S. T,Wuhan 430074,China., Cheng Liangjun |
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| Abstract: | The perturbahon theory is used to analyze the hydrodynamic instability of the viscoussublayer in the turbulent flow near the wall region. Based on the relation between the vis-cous sublayer and the coherent structure in the turbulent boundary layer,a simplified turbu-lent coherent structure model,or one for the unstable wavelike motion of the KelvinHelmholtz vortex layer with approximately continuous distribution under the action of perturbation,is proposed.This model has been used to studv the motion of sparse particles inthe turbulent bounday layer,and it has been found that the coherent structure plays a domi-nant role in the motion of sparse particles. |
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| Keywords: | silt-eroded ripple solid-liquid two-phase turbulent flow coherent structure instable wave |
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