双坡屋面低矮建筑群风干扰效应数值模拟  

Numerical simulation analysis of wind interference effects on low-rise gable-roofed buildings

作　　者：刘也[1] 戴益民[1] 邹思敏[1] 刘求山 雷静敏 蒋荣正 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2014年第4期74-78,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：交通运输部重大科技项目(2011318824140);广西防灾减灾与结构安全重点实验室开放课题(2013ZDK06);湖南省教育厅(13K088)

摘　　要：基于Fluent 6.3软件平台,采用RNG k-ε湍流模型,对日本东京工艺大学风洞试验模型及数据进行了验证,结果表明数值模拟与风洞实验数据拟合较好.同时,对2栋相同低矮双坡屋面建筑在不同受扰建筑布置角度时对建筑群的影响进行了数值模拟分析,结果表明,施扰建筑的表面风压分布及大小受影响较小,与单体建筑表面风压接近;而受扰建筑的影响相对较为明显,尤其是施扰建筑与受扰建筑纵轴夹角不大的情况下,受扰建筑屋脊背风面角部负风压较大.研究结果对低矮建筑群的风效应研究具有参考价值.A RNG k -εmodel,the reynolds averaged navier -stokes equations （RANS ）turbulence model,was added in software Fluent 6.3 to simulate the wind tunnel model of Tokyo Polytechnic University,it turned out that simulating results fit well with the wind tunnel test data.Then a detailed simulation analysis was performed for average pressure coefficient of two same low-rise gable-roofed buildings which at different angles of the downstream building.The results show that the average pressure coefficient of upstream building is hardly affected by the angle changing of the downstream building,and its surface pressure is close to individual building.But the downstream building is affected relatively clear especially the corner area of ridge at small angles.The results of the study have reference value for wind effect research of low-rise buildings.

关 键 词：低矮建筑 干扰效应 数值模拟 双坡屋面 

分 类 号：TU312.1[建筑科学—结构工程]