明渠非恒定流推移质输沙试验研究  

Experimental study on bed-load transport in unsteady open channel flows

作　　者：刘春晶[1] 曲兆松[1] 李丹勋[1] 王兴奎[1] 

机构地区：[1]清华大学水沙科学教育部重点实验室,北京100084

出　　处：《水力发电学报》2006年第2期31-37,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金资助项目(50009003;50221903)

摘　　要：为研究明渠非恒定流输沙特性,本文建立了一套非恒定流流速、水深、流量及推移质输沙率测量系统。进行了9组恒定流输沙及3组非恒定流输沙试验,结果表明:恒定流条件下Einstein公式比Meyer-Peter公式具有更好的精度;非恒定流的推移质输沙强度与水流强度变化存在不同步的现象,长时间平均输沙率大于恒定流结果。Aiming at studying the characteristics of sediment transport in unsteady open channel flows, the surveying system has been established for measuring the velocity, water depth, discharge and the bed-load transport. Experiments have been conducted by using the established system of which nine runs are in steady uniform flows and the three runs in unsteady flows with movable channel beds. Experimental results indicate that the Einstein＇s equation proves to be better than the Meyer-Peter＇s equation; the long term average bed-load rate in unsteady flows is greater than that in equivalent steady flows ; and the change of bed-load transport intensity is not in phase with the change of flow intensity.

关 键 词：河流泥沙工程学 非恒定流 推移质 水槽试验 

分 类 号：TV142[水利工程—水力学及河流动力学]