航道挖槽紊动特性试验研究  

Experimental Study on Turbulence Characteristics of Flow in Dredge-cut

作　　者：郭艳[1] 赵志舟[1] 周华君[1] 

机构地区：[1]重庆交通大学河海学院,重庆400074

出　　处：《水运工程》2007年第12期89-93,共5页Port & Waterway Engineering

基　　金：西部交通建设科技项目(200532800029)

摘　　要：挖槽是河道治理的重要工程措施之一。以长江上游神背嘴右槽为原型进行挖槽概化模型设计,采用三维超声流速仪,系统地测量不同挖槽断面下水流紊动特性,并对时均流速、紊动强度等沿垂线分布进行分析计算,同时还对挖槽水流纵向、横向及垂向的紊动强度分布特点进行了比较。试验结果表明,在一定数值范围内,窄深型断面底部应力和紊动强度相对较大,在减少航槽回淤方面优于宽浅型断面。Channel dredging is one of the important measures in fiver regulation. Based on the fight channel of Shenbeizui reach in the Yangtze River, turbulence characteristics of flow in different dredge-cut were studied in generalized model with a 3-D MicroADV system. The distributions of time-averaged velocities, turbulent intensities along depth were further analyzed and calculated. In addition, the distribution characters of longitudinal, lateral and vertical turbulent intensities were compared. It was found that within a certain scope the bottom stress and turbulence of narrow-deep pattern were larger, so it was better than the broad-shallow one in aspect of reducing sediment back silting.

关 键 词：挖槽 概化模型 紊动特性 

分 类 号：U616.1[交通运输工程—船舶及航道工程]