基于隔流堤的下游引航道通航水流条件优化  

Optimization of navigable flow conditions of downstream entrance channel with separation levee

作　　者：胡亮亮 谭家万 袁浩 HU Liang-liang;TAN Jia-wan;YUAN Hao(School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Southwest Research Institute for Water Transport Engineering,Chongqing 400016,China)

机构地区：[1]重庆交通大学航运与船舶工程学院,重庆400074 [2]重庆西南水运工程科学研究所,重庆400016

出　　处：《水运工程》2022年第5期72-77,共6页Port & Waterway Engineering

基　　金：国家自然科学基金项目(52109076)。

摘　　要：针对某航电枢纽下游引航道口门区通航水流条件复杂、恶劣等问题,依托该工程整体通航水力学模型试验,对比分析不同隔流堤布置方案下的口门区水流条件。结果表明,隔流堤堤身设置透水孔可以加强主河槽与口门区的动量交换,减小隔流堤末端两者之间的速度梯度。与未设置透空隔流堤方案相比,设置透空隔流堤后可减小下泄主流在弯道处引起的横流与回流。而增加透空隔流堤长度后可通过改变主流表面流速方向,达到改善处于弯道上的下游口门区通航水流条件的目的。合理应用隔流堤可避免口门区处于河道弯道处,减小主流引起的斜流与回流。Regarding the complicated and harsh navigable flow conditions at the approaching entrance region downstream of a navigation power hub,we compare and analyze the water flow conditions of the approaching entrance region under different separation levee arrangement schemes relying on an experimental study of a navigational power project.The results indicate that the separation levee can change the flow directions of the downstream flow in the main channel,and reduce the squeezing and friction by the mainstream on the water flow in the approaching entrance region.Compared with the scheme without the air-permeable separation levee,the installation of the air-permeable separation levee can reduce the cross flow and backflow caused by the main flow of the leakage at the bend.After increasing the length of the permeable separation levee,the direction of the flow velocity on the surface of the main flow can be changed to improve the navigable flow conditions of the downstream approaching entrance region on the curve.Furthermore,the reasonable application of the separation levee effectively reduces the lateral and reverse velocity caused by the main flow.

关 键 词：下游引航道 通航水流条件 流速分布 流场优化 

分 类 号：U61[交通运输工程—船舶及航道工程]