摘要
为研究截面为方形的高层扩散体建筑的风能集聚效应,采用风洞试验和CFD数值模拟相结合的方法,以平均风速、风速增大系数和湍流强度作为评价指标,选取建筑间距、风向角和建筑高差等作为控制变量,通过比较分析获得不同情况下高层扩散体建筑风能集聚效应的最佳位置.结果表明:适当的建筑间距对集聚效应具有加强作用,而后随间距增大集聚效应减弱,迎风面宽度相比风通道长度对风能集聚效应影响更大,且在建筑全高的1/2~5/6范围内风能集聚效应明显,其中在3/4处达最佳.然而,随着建筑高差的增大,风能集聚效应逐渐减弱,其中风速最大位于相对较低侧建筑全高的5/6处.
A wind tunnel experiment and CFD numerical modeling are employed to investigate the wind-energy gathering effect of diffuser high-rise buildings with square cross-section from different wind channel spacings, altitudes and wind angles. The study explores the optimum location of the wind energy gathering by comparing the mean-speed, the increased coefficient and the turbulent intensity. The results show that the windward side width has a larger gathering effect than the channel length, and the wind channel spacing strengthens the gathering effect when the distance value distributes in a limited range. The gathering effect occurs at the 1/2 to 5/6 height of the building and reaches to the optimum value at the 3/4 height of the building. The gathering effect decreases with the increase of the difference of building heights and the maximum wind speed occurs at the 5/6 height of the lower building.
作者
袁伟斌
王昭
李泽彬
YUAN Weibin WANG Zhao LI Zebin(College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China)
出处
《浙江工业大学学报》
CAS
北大核心
2017年第4期454-460,共7页
Journal of Zhejiang University of Technology
基金
浙江省自然科学基金资助项目(LY15E080023)
关键词
高层扩散体建筑
风洞试验
CFD数值模拟
风能集聚效应
diffuser high-rise buildings
wind tunnel test
CFD numerical modeling
wind energygathering effect
