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城市地区近地强风特性实测研究
引用本文:郅伦海,李秋胜,胡非.城市地区近地强风特性实测研究[J].湖南大学学报(自然科学版),2009,36(2).
作者姓名:郅伦海  李秋胜  胡非
作者单位:1. 湖南大学,建筑安全与节能教育部重点实验室,湖南,长沙,410082
2. 湖南大学,建筑安全与节能教育部重点实验室,湖南,长沙,410082;香港城市大学,建筑系,香港,九龙
3. 中国科学院,大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029
基金项目:面向21世纪教育振兴行动计划(985计划) 
摘    要:对北京气象塔47 m高度处超声风速仪测得的强风样本进行了分析.结果表明:近地强风的湍流度和阵风因子较大,顺风向湍流度实测值大都在0.3以上,3个方向的湍流度有随着风速增大而减小的趋势.实测湍流积分尺度之比与Solari和Piccardo总结的经验公式有一定差别,顺风向湍流积分尺度与日本结构工程规范给定的结果相符.实测得到湍流功率谱密度与冯·卡门经验谱基本吻合,说明冯·卡门谱能够较好地描述北京城市地区近地强风的脉动风速谱特性.

关 键 词:强风  湍流度  阵风因子  湍流积分尺度  功率谱

Field Measurements of Strong Wind Characteristics Near Ground in Urban Area
ZHI Lun-hai,LI Qiu-sheng,HU Fei.Field Measurements of Strong Wind Characteristics Near Ground in Urban Area[J].Journal of Hunan University(Naturnal Science),2009,36(2).
Authors:ZHI Lun-hai  LI Qiu-sheng  HU Fei
Institution:ZHI Lun-hai1,LI Qiu-sheng1,2,HU Fei3(1.Key Laboratory of Building Safety and Energy Efficiency,Ministry of Education,Hunan Univ,Changsha,Hunan 410082,China,2.Dept of Building and Construction,City Univ of Hong Kong,Tat Chee Avenue,Kowloon,Hong Kong,3.State Key Laboratory of Atmospheric Boundary Layer Physics and Atynospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China)
Abstract:This paper presented the analysis results of wind velocity data measured from an ultrasonic anemometer installed at the 47 m high location on the Beijing Meteorological Tower.The results have revealed that the turbulence intensity and gust factor of strong wind near ground are greater than normal.Most of the measured longitudinal turbulence intensities are greater than 0.3.The turbulence intensities at three directions are found to decrease with the increase of mean wind speed.There is a little difference b...
Keywords:strong wind  turbulence intensity  gust factor  turbulence integral length scale  power spectra  
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