泥沙浓度与水流紊动的试验研究  被引量:8

Experimental study of vertical distribution of sediment concentration in "sediment-laden" flow

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作  者:叶小云[1] 陈立[1] 王有生[1] 邹家喻[1] 

机构地区:[1]武汉大学水沙科学重点实验室,湖北武汉430072

出  处:《武汉大学学报(工学版)》2003年第2期10-14,共5页Engineering Journal of Wuhan University

基  金:国家自然科学基金 (5 0 0 790 18);霍英东青年教师基金 (710 70 );教育部骨干教师资助计划资助项目

摘  要:通过低含沙水流泥沙浓度分布的试验 ,研究泥沙浓度和紊动强度沿垂线的分布之间的内在联系 ,试验结果表明泥沙浓度和紊动强度沿垂线的分布一致性较好 ,并建立了二维情况下泥沙浓度和紊动强度沿垂线分布之间的关系式 .同时分析了关系式中泥沙浓度、泥沙的中值粒径对系数K的影响 ,中值粒径的影响较泥沙浓度对系数K的影响大 ,系数K随中值粒径的减小明显减小 .并在此基础上进一步建立了泥沙浓度与流速。Based on the flume experiment, the quantitative relationship of the vertical distribution of sediment concentration in the sediment_laden flow with the turbulence intensity has been established. Then the effects of the factors such as the maximum sediment concentration and the median diameter of particles on the relationship between turbulence intensity and the sediment concentration have been analyzed. The results indicate that the median diameter of the particle plays a more important role than the maximum sediment concentration in affecting the coefficient K . The coefficient K decreases with the increasing of median diameter of particles. Additionally, quantitative relationship between the sediment concentration and the velocity and its gradient has been established.

关 键 词:低含沙水流 泥沙浓度 紊动强度 MICROADV 

分 类 号:TV143.1[水利工程—水力学及河流动力学]

 

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