挟沙水流卡门常数的影响因素  

Influence factors of the von Karman constant of sediment-laden flows

作　　者：周宜林[1] 唐洪武[1] 闫静[1] 许芝国 郭琦[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]长兴县水利局,浙江长兴313100

出　　处：《泥沙研究》2008年第3期51-56,共6页Journal of Sediment Research

基　　金：国家自然科学基金资助项目(50479068);新世纪优秀人才支持计划项目(NCET-04-0494)

摘　　要：挟沙水流卡门常数是反映泥沙运动对水流结构影响的重要参数之一,本文回顾并讨论了挟沙水流卡门常数的计算公式及其影响因素。基于影响因素的量纲分析,得到了影响挟沙水流卡门常数的无量纲参数的关系式,由水槽实验资料确定出卡门常数的计算公式。经有关实验观测资料和长江、黄河实测资料的检验,表明本文所得公式计算的卡门常数与实验观测资料和野外实测资料的分析值均符合较好。The von Karman constant of sediment-laden flows is one of the important parameters reflecting the influence of sediment movement on the flow structure. In this paper, the formulas of the yon Karman constant, and the influence factors of the von Karman constant of sediment-laden flows are reviewed and discussed. Based on the dimensional analysis of the influence factors, the relation between the von Karman constant and the non-dimensional influence parameters is derived. The formula of the von Karman constant is validated by adjusting it to fit the experimental data. Some other experimental data, and the field data of the Yangtze River and the Yellow River are utilized to verify the formula of the von Karman constant. It shows that the formula fits all the data well.

关 键 词：卡门常数 挟沙水流 对数流速分布 水流结构 悬移质 

分 类 号：TV142[水利工程—水力学及河流动力学]