弯道水面横比降沿程分布特性研究  

Study on the longitudinal distribution of water surface transverse slope in curved conduits

作　　者：许光祥[1] 童思陈[1] 钟亮[1] 

机构地区：[1]重庆交通大学河海学院,重庆40074

出　　处：《水力发电学报》2009年第4期114-118,共5页Journal of Hydroelectric Engineering

基　　金：交通部科技项目(200432981413)

摘　　要：弯道的水力特性一直备受人们重视。河湾水面横比降则是其重要研究课题之一。目前弯道水面横比降的计算公式多只适用于弯顶部位。现场与试验资料均显示,弯道水面横比降是沿程变化的,一定条件下可能还相当明显。本文通过弯道水流模型试验,对该课题进行了系统研究,得到了弯道水面横比降沿程分布特性及其统一计算公式。通过与实测资料和前人成果的比较,说明本文公式更为简单适用。为进一步研究弯道的水力特性奠定了理论基础。The hydraulics of curved conduits has attracted a great attention of researchers,and the water surface transverse slope is an interesting issue.Up to now,most of the existing calculation methods of water surface transverse slope are limited to the curved apex region,while field data and experiments show that the variation of the transverse slope in the longitudinal direction is not negligible in most cases and may become considerable in some cases.Based on the model test data of curved conduit flow,this paper brings forth a formula for the longitudinal variation of water surface transverse slope.By comparing with field data,this formula is shown to be simpler and more accurate than the existing methods.

关 键 词：水力学 弯道 水面横比降 分布特性 

分 类 号：TV131.2[水利工程—水力学及河流动力学]