长沙理工大学学报（自然科学版）2016，Vol.13Issue(2)：75-79,5.
串列双桥墩紊流特性研究
Research of tandem double bridge pier turbulence characteristics
摘要
Abstract
Using the combination of generalized flume experiment and mathematical model test methods,a two-dimensional generalized model of water and bridge is established, through the study of the trace,trailing vortex intensity and shedding frequency,analyzing the pier spacing influence of turbulent flow characteristics around pier.The research has shown that:when tandem double bridge pier spacing smaller (L/D ≤ 2.0),the upstream bridge has no vortex shedding,the upstream bridge pier shear layer alternate adhere to the downstream piers,causing shear layer thickened before exercise,reducing trail vortex shed-ding frequency,the turbulence intensity increases.When 3.0 ≤L/D < 5.0,upstream and downstream bridge piers both have vortex shedding,and as bridge pier spacing bigger,vor-tex shedding phenomenon more obvious,the trailing vortex of the turbulence intensity re-duce along with the increase of spacing.After the bridge pier spacing increases to 5.0,up-stream and downstream turbulence of trailing vortex and trailing vortex shedding are similar to single bridge pier.关键词
串列双桥墩/紊动特性/数学模型/窝量/脱落频率Key words
tandem double bridge pier/turbulence characteristics/mathematical model/lit-ter amount/shedding frequency分类
建筑与水利引用本文复制引用
刘晓平,苏冠华,黄琼,任启明..串列双桥墩紊流特性研究[J].长沙理工大学学报（自然科学版）,2016,13(2):75-79,5.基金项目
湖南省研究生科研创新项目(CX2012B360) （CX2012B360）
