圆柱桥墩波环对斜交桥墩前冲击高度影响的研究  

Research on the Effect of the Oblique Shock Wave of Cylinder Piers on the Creep Height of the Skew Bridge

作　　者：华维娜[1] 张根广[1] 李礼[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《中国农村水利水电》2010年第12期115-118,共4页China Rural Water and Hydropower

摘　　要：通过物理模型试验对斜交桥前的壅水及冲高进行了观测,并建立三维水槽数值模型,采用SIMPLE算法耦合k-ε紊流模型求解N-S方程组,应用VOF法追踪自由表面,计算了单个圆柱桥墩的绕流流场及冲高,得到了圆柱桥墩产生的斜激波波环与水流Froude数之间的关系,结合单墩产生的斜激波波环分析了斜交桥上游桥墩产生的干扰水流对下游桥墩的墩前冲高的影响。The backwater and creep height of the skew bridge are observed by physical model test,and three-dimensional numerical model of water flume is established to simulate the disturbed flow field of a single cylinder pier,in which the k-ε turbulent model is used to close Reynolds equations and volume of fluid（VOF） method is used to track the free water surface.Based on the calculating results the relationships of the creep height of the coming water and the oblique shock wave of cylinder pier with the Froude numbers have been found to analyze the effect of the disturbed flow caused by the upstream pier on the creep height upon the downstream pier of skew bridge.

关 键 词：数值模拟 K-Ε紊流模型 冲高 斜激波 Froude数 

分 类 号：TV135.9[水利工程—水力学及河流动力学] U442.33[建筑科学—桥梁与隧道工程]