表面圆柱形突体流动特性的数值模拟  

Numerical simulation of flow characteristics around cylindrical surface protrusions

作　　者：李晓鹏[1] 董志勇[1] 

机构地区：[1]浙江工业大学水利与市政工程研究所,浙江杭州310032

出　　处：《浙江工业大学学报》2011年第2期219-223,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(50879078)

摘　　要：数值模拟技术作为研究复杂流动问题的有效工具常被用于研究高水头、大流量泄洪洞内高速水流问题.采用该项技术对泄水建筑物过流壁面上圆柱形突体的水平二维和垂直二维流场进行了数值模拟,分别考虑了不同高度圆柱形突体和不同掺气浓度对空化区内流动特性的影响,给出水平二维和垂直二维的流速分布和压力分布,对圆柱形突体引发空化的水力特性进行探讨,并与在直流式水洞中使用PIV设备所采集的实测结果作了比较,结果表明,数值模拟能较好模拟因圆柱形突体引发的空化现象.Numerical simulation of cavitation flow was performed by applying simple law of overflow surface under the construction of outlet works.This paper presents numerical simulation of both horizontal and vertical two-dimensional flow fields around cylindrical protrusions on overflow surface of flood release structures.Effects of cylindrical protrusions with different heights and different air concentrations on flow characteristics in cavitation zone were considered.Velocity and pressure profiles in horizontal and vertical two-dimensional flows were obtained,and compared with the PIV measured data of straight-flow water tunnel.

关 键 词：数值模拟 圆柱形突体 空化 掺气 

分 类 号：TV131.3[水利工程—水力学及河流动力学]