超声风速仪与三轴风速仪测风的比较研究  

The Comparison Between Sonic-Anemometer and Three-Component Propeller Anemometer

作　　者：刘艳华[1] 李富余[2] 张宏升[1] 陈重[2] 康凌[1] 张霭琛[2] 

机构地区：[1]北京大学环境学院环境科学系,北京100871 [2]北京大学物理学院大气科学系,北京100871

出　　处：《气象水文海洋仪器》2003年第3期7-16,共10页Meteorological,Hydrological and Marine Instruments

基　　金：国家自然科学研究基金委员会;国家重点基础研究项目资助

摘　　要：利用1990年8月在中国西北戈壁地区进行的湍流仪器水平比较实验资料,对比分析了超声风速仪与三轴风速仪测风结果。结果表明:超声风速仪和三轴风速仪的水平风速和水平风速脉动方差测量值的相关性在0.99以上,垂直风速脉动方差为0.93,摩擦速度的相关偏差仅为0.78。三轴风速仪的湍流谱曲线在其截止频率前约1个数量级时明显比超声风速仪结果偏低,且高频段谱曲线上翘。Base on the data that obtained from three-component propeller anemometer and sonic-anemom- eter over Gobi region in northwest China in August 1990, the comparsion of wind speed is analyzed in this paper, The result shows that: (1)The reativity of main wind spead and the fluctuation of horizontal velocity is more than 0. 99; the relativity of the fluctuation of vertical velocity and friction velocity are 0. 93 and 0. 78 respectively. The value of power spectrum by three-component propeller anemometer is smaller than that by sonic-anemometer during the high freqency range, and increase with the value of fre- quency increasing.

关 键 词：超声风速仪 三轴风速仪 测风 比较研究 湍流 观测法 

分 类 号：TH765.4[机械工程—仪器科学与技术]