期刊文献+

两次台风过程近地层湍流度和阵风因子分析 被引量:17

Analysis on turbulence and wind gust factor in surface layer during two typhoon processes
下载PDF
导出
摘要 利用2005年台风"麦莎"和"卡努"期间青岛海岸实测三维风观测资料,挑选6个10 m in平均风速≥8 m/s的强风时段,使用矢量分析方法研究台风影响华东地区时近地层的平均风速风向变化、湍流度和阵风因子变化等湍流特性,结果表明台风影响期间,近地层湍流脉动风速不稳定,水平方向、垂直方向风速风向快速变化;虽然台风"麦莎"、"卡努"入海地点不同,不同强风时段近地层湍流度差异也较大,但湍流强度都表现为Iu(横向)>Iv(纵向)>Iw(垂直向)。两次台风影响过程不同强风时段近地层阵风因子的变化与湍流度的变化是一致的,在风速增大风向转变的时段,湍流度和阵风因子明显增大。 Among the 3D wind data measured during periods of typhoon "Matsa" and "Khanun" in Qingdao coast , six strong wind periods in which average wind speed per 10 min. exceeding 8 m/s during the two typhoons are selected. By the vector analysis method, the turbulence characteristics, such as average wind velocity and direction change, turbulence and wind gust factors in surface layer in East China during the typhoon influence are analyzed. The results show that during the affected typhoon, the turbulent fluctuation is instable, the horizontal and vertical wind velocity and direction change rapidly, even though the tracks into the sea are different between typhoon "Matsa" and "Khanun", and the turbulence intensities are obviously different in surface layer during different strong wind periods, according to Iu 〉 Iv 〉 Iw. The evolution of gust factor and turbulence is the same in the two typhoon processes ; the turbulence and the gust factor increase significantly, when wind velocity is increasing and direction is changing
出处 《气象科学》 CSCD 北大核心 2009年第4期454-460,共7页 Journal of the Meteorological Sciences
基金 江苏省科技厅社会发展项目(BS2005055) "青岛海湾大桥工程气象专题"
关键词 近地层 湍流度 阵风因子 Surface layer Typhoon Turbulence Gust factor
  • 相关文献

参考文献13

二级参考文献132

共引文献328

同被引文献340

引证文献17

二级引证文献91

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部