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Position: Home > Articles > Law of Water Velocity Vertical Distribution under Ice-cover Journal of Shenyang Agricultural University 2009,40 (4) 465-470

冰盖下水流流速垂向分布规律研究

作  者:
王志兴;李成振;陈刚
单  位:
中水东北勘测设计研究有限责任公司;西安理工大学水利水电学院
关键词:
水动力学;冰盖;流速分布;紊流模型;双幂律
摘  要:
采用三维k-ε紊流模型,对封冻河道冰盖下水流流速垂向分布规律进行了研究。结果表明:冰盖下水流流速垂向分布主要受床面与冰盖粗糙度的相对大小影响,受水深影响较小,对雷诺数变化并不敏感;在流动核心部分分布较为均匀,并不遵循对数分布规律。研究结果揭示了冰盖对水流流动的影响,指出了目前普遍采用的流速分区及平均流速相等的假定理论上的缺陷。最后采用双幂律拟合冰盖下水流流速垂向分布,取得了良好的效果。
译  名:
Law of Water Velocity Vertical Distribution under Ice-cover
作  者:
WANG Zhi-xing1,3,LI Cheng-zhen2,CHEN Gang1,4(1.The Institute of Water Conservancy and Hydroelectricity of Xi'an University of Technology,Xi'an 710048,China;2.China Water Northeastern Investigation,Design And Research Co.,Ltd,Changchun 130061,China;3.Heilongjiang Provincial Water Conservancy and Hydroelectric Power Investigation,Design and Research Institute,Harbin 150080,China;4.The Institute of An'kang,An'kang Shanxi 725000,China)
关键词:
hydrodynamics;ice-cover;velocity distribution;turbulent mixing;double-power law
摘  要:
The 3-D k-ε turbulence model is applied to study the law of water velocity vertical distribution under ice-cover.It is found that water velocity vertical distribution under ice-cover is influenced mainly by the relative size of channel roughness and ice-cover roughness,less by the water depth and not sensitive to the variation of Reynold number as well,which is relatively uniform in the flow core and deviates from the logarithmic law.The study result illuminates the influence of ice-cover to water velocity,points out the theoretical falsehood of velocity independence and the mean velocity is equal to research.At last adopting double-power law to fit water velocity vertical distribution under ice-cover which gets a good result.

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