湖南大学学报（自然科学版）2019，Vol.46Issue(1)：47-54,8.DOI:10.16339/j.cnki.hdxbzkb.2019.01.005
平面壁面射流风场作用下建筑物表面风压数值模拟
Numerical Simulation of Mean Wind Pressure Distribution on Building Surface under Plane Wall Jet Wind Field
摘要
Abstract
The downburst outflow wind field was modeled by plane wall jet, and the co-flow was used to simulate the translation of downburst. Based on the computational fluid dynamics (CFD) method, the velocity profile of steady downburst was simulated with Reynolds stress model (RSM) , and then a high-rise building model was put into the wind field to study the surface pressure distribution. The velocity profile from the numerical analysis results matches well with the empirical models as well as the plane and radial wall jet experiments. The pressure distribu-tion characteristics of the building model in plane wall jet flow is in good accordance with the results of the imping jet experiment. The pressure coefficient decreases when the downstream distance increases. The pressure coefficient decreases with the increase of wall jet inlet turbulence intensity. When the half-width of the downburst velocity pro-file is higher than 1.45 times height of the building, the pressure distribution in wall jet flow is similar with that in boundary layer. Co-flow mainly has influence on the structure in the lower part. The wind direction of wall jet has little effect on the maximum pressure.关键词
下击暴流/平面壁面射流/数值模拟/雷诺应力模型/风压系数Key words
downburst/plane wall jet/numerical simulation/Reynolds stress model/wind pressure coefficient分类
建筑与水利引用本文复制引用
钟永力,晏致涛,游溢,赵爽..平面壁面射流风场作用下建筑物表面风压数值模拟[J].湖南大学学报（自然科学版）,2019,46(1):47-54,8.基金项目
国家自然科学基金资助项目(51478069,51178489) （51478069,51178489）
重庆市科委项目(CSTC2017JCYJB0210) （CSTC2017JCYJB0210）
中央高校基本科研业务费专项资金资助项目(106112017CDJXSYY002) （106112017CDJXSYY002）
