| 坡面浅层明流流态界定方法之商榷 |
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| 引用本文： | 张宽地,王光谦,吕宏兴,王占礼.坡面浅层明流流态界定方法之商榷[J].气动实验与测量控制,2011(4):67-73. |
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| 作者姓名： | 张宽地 王光谦 吕宏兴 王占礼 |
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| 作者单位： | [1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]清华大学水利系,北京100084 [3]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 |
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| 基金项目： | 国家自然科学基金项目（41001159）;国家973计划课题（2007CB407201）;高校博点基金项目（20090204110019） |
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| 摘 要： | 为了探求坡面薄层水流流态界定方法，从流体力学与泥沙运动学观点出发，对4种不同粗糙尺度床面（光滑玻璃、人工加糙粒径分别为0．075、0．245和0．380mm）、5种不同坡度下坡面薄层水流放水进行试验研究，并对薄层水流阻力规律与明渠水流阻力规律进行了比较分析。在此基础上提出了粘性底层厚度与水深之比作为新的无量纲临界判数，结果表明该判数能更好地反映坡面薄层水流流动型态。
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| 关 键 词： | 坡面浅层明流 流态 雷诺数 粘性底层厚度 |
Discussion on flow pattern determination method of shallow flow on slope surface |
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| Authors: | ZHANG Kuan-di WANG Guang-qian LU Hong-xing WANG Zhan-li |
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| Institution: | 1. College of Water Conservancy and Architectural Engineering, Northwest A ＆ F University , Yangling Shaanxi 712100 , China; 2. Department of Hydraulic Engineering,Tsinghua University, Beijing 100084,China; 3. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science,Yangling Shaanxi 712100,China) |
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| Abstract: | In order to research the flow pattern determination method of shallow flow on slope surface,from the viewpoint of fuild mechanics and sediment transportmechanics, a series of experiments of shallow flow on slope surface were performed on organic glasss lippery bed and artificial rough bed （grain size of sediment is from 0. 075mm to 0.38mm ） with five kinds of gradient. A new method for determinating the flow pattern of shallow flow, which is nondimensional parameter of ratio of viscosity bottom and depth, is derived from analysis of resistance of shallow flow on slope surface and flow resistance. The results show that the new method can reflect flow pattern of shallow flow on slope surface better. |
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| Keywords: | shallow flow on slope surface flow pattern Reynolds number viscosity bottom thickness |
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