| 明渠均匀流垂线流速分布规律研究 |
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| 引用本文： | 赵明登,槐文信,李泰儒.明渠均匀流垂线流速分布规律研究[J].武汉大学学报(工学版),2010,43(5). |
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| 作者姓名： | 赵明登 槐文信 李泰儒 |
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| 作者单位： | 1. 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072
2. 环境保护部华南环境科学研究所,广东,广州,510655 |
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| 摘 要： | 针对现有明渠均匀流对数流速分布公式和指数流速分布公式存在的问题,根据明渠均匀流切应力与速度梯度的关系,推导出了一个新的流速分布公式.该公式在渠底和水面都与理论分析、实际情况相符.新的流速分布公式较现有对数流速分布公式和指数流速分布公式在理论上更加完善,更加合理.实验资料验证表明,新公式可以较好地反映实际流速分布规律.
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| 关 键 词： | 明渠流 流速分布 均匀流 切应力 紊流 |
Study of velocity profile of uniform flow in open channels |
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| ZHAO Mingdeng,HUAI Wenxin,LI Tairu.Study of velocity profile of uniform flow in open channels[J].Engineering Journal of Wuhan University,2010,43(5). |
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| Authors: | ZHAO Mingdeng HUAI Wenxin LI Tairu |
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| Affiliation: | ZHAO Mingdeng1,HUAI Wenxin1,LI Tairu2 (1.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China,2.South China Institute of Environmental Sciences,Ministry of Environmental Protection,Guangzhou 510655,China) |
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| Abstract: | The available formulas of the vertical velocity profile of uniform flow in open channels still have some imperfections,and a new one was derivated from the relationship between the shear stress and the gradient of velocity.The new formula is agreed with the results of theoretical analysis and practical cases in both water surface and bottom.Theoretically speaking,it is more reasonable than the logarithmic law and the exponential equation.Furthermore,the experimental data show that the new formula can well e... |
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| Keywords: | open channel flow velocity profile uniform flow shear stress turbulent flow |
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