Effect of the fish-bone dam angle on the flow mechanisms of a fish-bone type dividing dike

被引:0
|
作者
Ni J. [1 ]
Wang L. [1 ]
Chen X. [1 ]
Xue L.L. [1 ]
Shahrour I. [2 ]
机构
[1] State Key Laboratory of Subtropical Building Science, South China University of Technology
[2] Civil and Geo-Environment Engineering Laboratory, Lille University
来源
Xue, Luan Luan (xueluanluan@scut.edu.cn) | 1600年 / Marine Technology Society Inc.卷 / 54期
基金
中国国家自然科学基金;
关键词
Fish-bone dam; Fish-bone type dividing dike; Flow characteristics; Mid-channel bar; Vortex area;
D O I
10.4031/MTSJ.54.3.9
中图分类号
学科分类号
摘要
Fish-bone type dividing dikes are river engineering structures used for river training and to protect a mid-channel bar from scour. The flow characteristics around fish-bone type dividing dikes are very complicated, especially near its fish-bone dam. To understand the flow and scour processes associated with fish-bone dams, this paper conducts a numerical simulation of flow characteristics for different fish-bone dam angles. Based on the Yudaizhou fish-bone type dividing dike of the Dongliu Waterway, a 3-D numerical model is established via Flow-3D to simulate the flow characteristics around a fish-bone type dividing dike, which is verified by flume experiments. Based on the results, the effects of different fish-bone dam angles on water level and velocity distribution are inves-tigated. With increasing fish-bone dam angle, the longitudinal and lateral gradi-ents of the water level gradually decreased, and the variation degree of the longitudinal velocity also decreased; however, the variation degree of the lateral velocity increased. Vortex areas formed around the fish-bone dam and the downstream zone of the dike. A large velocity gradient was found around the dike, and the downstream vortex area decreased with increasing fish-bone dam angle. © 2020, Marine Technology Society Inc. All rights reserved.
引用
收藏
页码:58 / 67
页数:9
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