泥沙研究2025，Vol.50Issue(5)：50-57,65,9.DOI:10.16239/j.cnki.0468-155x.2025.05.007
斜交桥墩对S型弯道局部水流结构特性的影响研究
Study on the influence of oblique pier on the local flow structure characteristics in S-bend
摘要
Abstract
In order to analyze the influence of oblique piers on the local flow structure of the river bend,a three-dimensional model of"S"-shaped double bend was established,the SIMPLE algorithm coupled with RNG k-e turbulence model and VOF method were used to track the free liquid surface.After comparing the flow structure distribution of the bend with and without piers,the influence of the piers under different oblique angles α=0°,15°,30°,45° and 60° on the circulation structure of the bend and the flow turbulence around the piers is analyzed qualitatively.The results show that the existence of pier and the oblique angle have a sig-nificant effect on the circulation structure of the bend.Especially,when the oblique angle is large(α＞45°),the circulation structure at the section behind pier becomes more complicated and disorderly,and the circula-tion in the back bend develops more fully than that in the front bend.The rotation degree of circulation increa-ses with the increase of oblique angle,and the increase after pier is greater than that in front of pier.The ver-tical distribution of turbulence intensity changes from"J"-shapes without pier to"W"-shape with pier.The oblique angle of the pier and bend together increase the flow turbulence in the pier area.关键词
弯道水流/斜交桥墩/环流强度/环流旋度/紊动特性Key words
bend flow/oblique pier/circulation intensity/circulation vorticity/turbulence characteristics分类
建筑与水利引用本文复制引用
石喜,宋婷婷,陈辉,陶虎..斜交桥墩对S型弯道局部水流结构特性的影响研究[J].泥沙研究,2025,50(5):50-57,65,9.基金项目
国家自然科学基金项目(52360031) （52360031）
甘肃省高等学校产业支撑计划项目(2022CYZC-32) （2022CYZC-32）
兰州交通大学-天津大学联合创新基金项目(LH2023008) （LH2023008）
