城市街渠大气湍流结构的小波分析  

WAVELET TRANSFORMS AND THEIR APPLICATIONS TO TURBULENCE OF CITY STREET CANYONS

作　　者：张明[1] 王体健[1] 金龙山[1] 李宗恺[1] 

机构地区：[1]南京大学中尺度灾害性天气教育部重点实验室,南京210093

出　　处：《气象科学》2003年第2期224-230,共7页Journal of the Meteorological Sciences

基　　金：江苏省城市大气环境容量及总量控制对策研究项目资助

摘　　要：利用小波分析方法对城市街渠大气湍流场特征进行了初步研究 ,发现小波变换能够很好地揭示湍流的串级结构和多尺度结构。结合Fourier分析对湍流中不同尺度涡旋对能量的贡献进行了比较 。Wavelet transforms were used to the primary study on the turbulence characteristics of urban street canyons.It was found that wavelet transform performs well in turbulence cascade structure and multi-resolution analysis.Through Fourier analysis,contributions of different scale turbulence to turbulence energy were compared,and it was found that noise energy concentrated on high frequency band.

关 键 词：小波分析 湍流 城市街渠 

分 类 号：P425.2[天文地球—大气科学及气象学]