| 不同排列粗糙元对湍流拟序结构的影响 |
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| 引用本文： | 卢浩,王兵,张会强,王希麟.不同排列粗糙元对湍流拟序结构的影响[J].工程热物理学报,2011(9):1519-1523. |
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| 作者姓名： | 卢浩 王兵 张会强 王希麟 |
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| 作者单位： | 清华大学北京市3E能源重点实验室航天航空学院; |
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| 基金项目： | 国家自然科学基金资助项目(No.50876053) |
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| 摘 要： | 采用氢气泡流动显示技术，研究了壁面不同排列粗糙元对近壁湍流拟序结构的影响。实验中基于平均速度和水力直径的雷诺数分别为14300、31200、48000。氢泡丝上游布置的离散粗糙元直径为2．3、4和6mm，得到了光滑壁面和5种不同排列方式的离散粗糙元壁面湍流条带和湍流斑块特征。结果发现：相同雷诺数和相同排列方式下条带间距...
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| 关 键 词： | 壁湍流 拟序结构 粗糙元 氢气泡流动显示技术 流动控制 |
Effects of Roughness Element Arrangements on Near-Wall Coherent Structures |
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| LU Hao WANG Bing ZHANG Hui-Qiang WANG Xi-Lin.Effects of Roughness Element Arrangements on Near-Wall Coherent Structures[J].Journal of Engineering Thermophysics,2011(9):1519-1523. |
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| Authors: | LU Hao WANG Bing ZHANG Hui-Qiang WANG Xi-Lin |
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| Institution: | LU Hao WANG Bing ZHANG Hui-Qiang WANG Xi-Lin (Beijing 3E Energy Key Laboratory,School of Aerospace,Tsinghua University,Beijing 100084,China) |
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| Abstract: | This paper investigates effects of roughness element arrangements on near-wall coherent vortex structures using hydrogen bubble flow visualization technology.The flow Reynolds number,based on the mean flow velocity and channel hydraulic diameter,is 14300,31200 or 48000.Roughness elements are arranged upstream before the bubble wire in five different ways. Their diameter is 2.3,4,or 6 mm.The morphological characteristics of near-wall turbulence streaks and turbulence spots are obtained.The streak spacing for... |
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| Keywords: | wall turbulence coherent structure roughness elements hydrogen bubble flow visualization flow control |
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