典型低矮双坡屋盖平均风压的数值模拟  

Numerical simulation study of wind pressures on typical low-rise building with gable roof

作　　者：张建胜[1] 周锋[1] 卢成原[1] 毛建飞 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014

出　　处：《浙江工业大学学报》2014年第3期302-306,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金青年项目(51108418);教育部科学技术研究重点项目(212068)

摘　　要：基于计算流体动力学软件FLUENT对沿海地区典型的低矮双坡屋面在带漩流修正的Realizable k—ε湍流模型下进行数值模拟.计算域采用四面体网格划分,并对建筑模型近壁面进行适当加密,使用SIMPLEC分离算法完成对非线性离散化方程的求解.依据结果深入分析屋倾角、挑檐长度和风向角三个参数对屋盖平均风压的影响.分析结果表明:屋倾角和风向角对屋面风压影响较大,挑檐长度对迎风屋面影响与其他两个参数相比不显著.A numerical simulation study based on Realizable k-ε turbulence model and FLUENT software was conducted on low-rise building with gable roof in this paper.In the simulation,the computational domain was divided into tetrahedral elements,and the grids of near wall is was more dense,and the discrete nonlinear equations were solved using the semi-implicit method （SIMPLEC）.Based on the simulation results,this paper analyzes three important factors such as roof pitch,wind direction and length of roof overhang.Finally it was confirmed that pressures on roof were greatly influenced by roof pitch and wind direction,and inconspicuously influenced by the length of roof overhang.

关 键 词：低矮房屋 双坡屋盖 平均风压 升力系数 数值模拟 

分 类 号：TU312.1[建筑科学—结构工程]