河湾坡岸非均匀沙起动流速公式探讨  

Research on incipient velocity of nonuniform sediment on slope of bend river bank

作　　者：钟亮[1] 许光祥[1] 童思陈[1] 

机构地区：[1]重庆交通大学河海学院,重庆400074

出　　处：《泥沙研究》2009年第4期58-62,共5页Journal of Sediment Research

基　　金：交通部科技项目(200432981413)

摘　　要：针对河湾水流的特性,考虑了相对暴露度引起的附加质量力的影响,引入了等效粒径的概念,采用滑动平衡模式建立了河湾坡岸无黏性非均匀沙起动流速公式,通过试验资料对公式的合理性进行了验证,结果较为理想。With consideration of the flow characteristics in a bend river, the equivalent diameter and the influence of virtual mass force produced by relative exposure degree, the incipient velocity formula for non-cohesive nonuniform sediment on the slope of bend river bank is established by using sliding balance mode. The verification shows that the simulated results from the proposed formula agree well with the experimental data.

关 键 词：河湾坡岸 非均匀沙 暴露度 等效粒径 起动流速 

分 类 号：TV142.1[水利工程—水力学及河流动力学]