风对定日镜影响的计算流体动力学数值模拟  

Numerical simulation of wind effects on heliostat by computational fluid dynamics

作　　者：卢春玲[1,2] 李正农[1] 李秋胜[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]桂林工学院土木系,广西桂林541004

出　　处：《自然灾害学报》2010年第1期185-191,共7页Journal of Natural Disasters

基　　金：国家自然科学基金资助项目(50778072);广西建筑工程检测与试验重点实验室开放基金资助项目(桂科能07109005-12)

摘　　要：利用linux系统下软件平台Fluent 6.3的并行计算技术和实用的结构网格划分方法,基于Reynolds时均方程,分别采用两种湍流封闭模型:标准k-ε和MMK修正的k-ε模型,模拟计算了定日镜结构的平均风压系数、阻力、升力以及力矩系数和平均风流场。分析了定日镜镜体平均风压、平均风流场的分布规律和特点;并将数值计算结果与风洞试验进行了比较。结果表明,基于Fluent6.3的MMK修正的k-ε模型较之标准k-ε模型有更好的预测效果。Numerical simulation was conducted to predict the mean wind load coefficients, the coefficients of drag and lift force on the heliostat and the mean velocity field around the heliostat. The numerical simulation used the paralleled technology of software Fluent 6.3 under the linux system, adopted the practical mesh arrangement and based on the Reynolds averaged equations and two turbulent models, i. e. the standard k-ε model and the MMK model. The distribution characteristics of the surface wind pressure on the heliostat and the wind environment a- round the heliostat were obtained and analyzed, then, the computed results were compared with extensive experimental data which were obtained at wind tunnels. It is found that the MMK model gives better results than the standard k-ε model.

关 键 词：计算风工程 定日镜 数值模拟 k-ε湍流模型 

分 类 号：TU973.213[建筑科学—结构工程]