空气动力学学报2017，Vol.35Issue(6)：801-806,822,7.DOI:10.7638/kqdlxxb-2015.0090
城市地貌高空台风特性及湍流积分尺度的研究
Study on typhoon characteristics at high urban landform altitude and turbulence integral length scale
摘要
Abstract
Based on the actually measured wind field materials about No.10 Typhoon, namely Matmo,from high urban-landform altitude in 2014,the data were analyzed in five time intervals (30 s,1 min,5 min,10 min and 20 min respectively),and strong wind characteristics were obtained with respect to the averaged wind speed,the wind direction,the turbulence intensity,the gust factor,and the fluctuating wind spectrum.The turbulence integral scale was then calculated with two methods based on Taylor assumption to investigate the effects of time intervals on the turbulence integral scale regarding the averaged wind speed,the turbulence intensity,and the gust factor.The results show that the averaged wind speed is the highest when the average time interval is 5 min.However,the turbulence intensity,the wind gust factor,and the corresponding variances and coefficients of variation are the smallest.These results are reasonable due to the densest calculated distributions of turbulence integral scale and the lowest variance gained by self-correlation function integral method.关键词
湍流特性/自相关函数/指数衰减率/积分尺度Key words
turbulence characteristics/autocorrelation function/exponential decay rate/integral scale分类
建筑与水利引用本文复制引用
王澈泉,李正农,胡佳星,张学文,周利芬,曹守坤..城市地貌高空台风特性及湍流积分尺度的研究[J].空气动力学学报,2017,35(6):801-806,822,7.基金项目
国家自然科学基金重大研究计划(91215302) （91215302）
国家自然科学基金(51478179,51178180). （51478179,51178180）
