营口市奥体中心体育场风压分布及风环境的数值模拟研究

Numerical simulation of wind pressure distribution and wind environment of the stadium in Yingkou Olympic Center

基于CFX10.0软件及LINUX大型并行服务器操作平台,采用剪切应力输运(SST)k-ω模型对营口市奥体中心体育场屋盖进行了风压分布及风环境的数值模拟,得到了体育馆屋盖表面的平均风压系数,并分析了屋面的风压、湍动能分布特性,比较了屋盖在各风向角下总升力,得出了最不利风向角和分区风载体型系数.同时给出了双屋盖、仅ROOF1、仅ROOF2等三种计算模型时屋盖表面的风压分布.通过分析可以得到,随着区域位置的变化,体型系数值有很大不同,且其对风向角的敏感程度也不同;位于上游风场的屋盖和下部建筑(看台)的存在对体育场内流场及下游风场屋盖表面风压分布有很大的影响.

The distribution of wind pressure and wind environment above the roofs of the stadium in the Olympic center of Yingkou are computed based on CFX10.0 software platform with Shear-Stress-Transport （SST） k-ω model. From the numerical simulation results, the average pressure coefficient above the roofs are obtained. Also, the most unfavorable wind direction and block shape coefficient are obtained by analyzing both the behavior of wind pressure and the total wind force on the roof. Meanwhile the turbulence kinetic energy on the faces of ROOF1 and ROOF2 are compared to catch the fluctuating part of the wind. At last, three different numerical models, considering the presence of the neighbor roof of ROOF1 or ROOF2, are calculated to configure the influence of the existence of one or two roofs. Based on above works, it can be found that the block shape coefficient is correlated with the location of the block on the roofs and the inflow direction. The flow in the stadium and pressure above the down-wind roof are affected by the existence of the up-wind roof and the stand under the roofs.