高雷诺数下倒虹吸闸墩绕流水力特性
Force Characteristics of Flowing Water Around the Inverted Siphon Pier at High Reynolds Number
贺蔚 1周红星 1秦杭晓 1曾庆林 1张健 2徐辉2
作者信息
- 1. 河海大学 水利水电学院, 江苏 南京 210013
- 2. 河海大学 水利水电学院, 江苏 南京 210013;河海大学 水安全与水科学协同创新中心, 江苏 南京 210013
- 折叠
摘要
为研究倒虹吸出口闸墩绕流特性,以南水北调某典型倒虹吸为例,基于 Flow3D软件建立倒虹吸模型,根据现场原型实测水位、流速进行模型验证;利用该模型模拟了雷诺数 6.17×106～9.38×106 范围下闸墩绕流特性.结果表明,高雷诺数条件下,随着雷诺数的增加,闸墩绕流造成的液面波动幅度增加,中墩液面波动显著大于边墩;闸墩后的尾涡量持续增加,雷诺数对斯特劳哈尔数影响不大;边侧闸墩受力的非对称性明显,边墩闸室间特征流速偏流比存在先增大再减小的变化规律,偏流效应造成的离心距不断增加.本研究可针对性改善输水工程水流流态.
Abstract
To study on the flow characteristics around outlet of gate pier in inverted siphon,the typical inverted si-phon of the South-to-North Water Diversion project is taken as an example.The inverted siphon model is established based on Flow3D software,and the model is verified based on the field prototype measured water level and velocity.Based on this model,the flow characteristics around the gate pier at Reynolds number range of 6.17×106-9.38×106 are simulated.The results show that under the condition of high Reynolds number,the fluctuation amplitude of liquid level caused by flow around gate pier increases with the increase of Reynolds number,and the fluctuation of liquid level at mid-dle pier is significantly greater than that at side pier.The vorticity of the tail vortex behind the pier continues to increase,and the Reynolds number has little effect on the Strauhar number.The force asymmetry of the side pier is obvious.The bias ratio of the characteristic velocity between the side pier chambers increases first and then decreases,and the centrifu-gal distance caused by the bias effect keeps increasing.This study can improve the flow pattern of water conveyance pro-ject.
关键词
南水北调中线工程/卡门涡街/闸墩绕流/偏流效应/倒虹吸Key words
middle route of south-to-north water diversion project/Karman vortex street/flow around gate pier/drift effect/inverted siphon引用本文复制引用
基金项目
国家自然科学基金(52379061)
江苏省自然科学基金(BK20230099)
水利部水网工程与调度重点实验室开放基金(QTKS0034W23292)
出版年
2024
NETL
NSTL
维普
万方数据