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《Advances In Water Science》 2005-04
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Experimental study on effect of sediment on velocity distribution in sediment-laden flow

ZHOU Jia-yu1, CHEN Li2, YE Xiao-yun3, WU Men-wu2, HUANG Rong-min2 (1.Chongqing Communication University, Southwestern Hydrautic Engineering Research Institute for Waterway, Chongqing400016, China; 2.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan430072, China; 3.Survey the Planning and Design Research Institute of the Yangtze River Conservancy Committee, Wuhan430010, China)  
The turbulent structure and the vertical distribution of the velocity of sediment-laden flow would be effected by the sediment condition including sediment particles′diameters and concentration.In this paper, the MicroADV is used to measure the mean velocity distribution of sediment-laden flow.It analyzes the influence of interaction between the sediment particles and flow on the distribution of the velocity of the flow with the different sediment condition and flow intensity.By verifying the application of the existing distribution formula with the experimental data, a new formula of exponential of the velocity distribu- tion is proposed, at the same time, the variational law of coefficient (k) and index (m) in the new formula with the sediment concentration (s), the diameter of particles (d) and the hydraulic condition is analyzed. It is concluded that thekincreases with the increasing sediment concentration, the hydraulic condition and the diameter of particles. However, themdecreases with the increasing diameter of particles, and increases with the increasing sediment concentration.
【Fund】: 国家自然科学基金资助项目(50479036);; 国家重点基础研究发展计划(973)资助项目(2003CB415205);; 湖北省创新群体基金项目(2003ABA195);; 博士点基金项目~~
【CateGory Index】: TV143.4
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