风阻效应对建筑立面风驱雨影响特性研究  

Research on the influence of wind-blocking effect on wind-driven rain on building facades

作　　者：王辉[1,2] 孙建平[1] WANG Hui;SUN Jianping(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China;State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640

出　　处：《合肥工业大学学报（自然科学版）》2019年第10期1361-1367,共7页Journal of Hefei University of Technology：Natural Science

基　　金：教育部留学回国人员科研启动基金资助项目(教外司留[2011]1568号);安徽省自然科学基金资助项目(11040606M116);亚热带建筑科学国家重点实验室开放课题资助项目(2016ZB08)

摘　　要：文章基于欧拉多相流(Eulerian multiphase,EM)模型,采用Fluent软件中的用户自定义函数(user-defined function,UDF)建立风驱雨(wind-driven rain,WDR)控制方程,模拟降雨时不同尺度建筑的稳态WDR场,分析风阻效应对建筑迎风立面WDR分布的影响特性。研究表明:风阻效应对建筑WDR雨强有削减作用;随建筑尺度的增大,风阻效应对建筑WDR雨强的削减影响增强,且降雨强度越大,该影响随建筑尺度的变化趋势越显著。In this paper, a numerical simulation approach is established based on the Eulerian multiphase(EM) model with the utility of Fluent user-defined function(UDF). Then steady state wind-driven rain(WDR) fields are modeled considering a series of isolated building configurations with different windward facade dimension. The WDR distribution on windward facades and trajectories of raindrops are presented, followed by an analyzation on the influence of wind-blocking effect. The results indicate that the WDR exposure decreases due to wind-blocking effect, which is more pronounced as windward facade dimension increases(either height or width). And the variation of such influence versus building scale is more significant under higher rainfall intensities.

关 键 词：建筑风驱雨 风阻效应 抓取率 建筑尺度 欧拉多相流(EM) 

分 类 号：TU119.2[建筑科学—建筑理论] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]