利用超声风速仪估算近地层光学湍流强度

Estimation of Optical Turbulence Intensity by Ultrasonic Anemometer

根据K41湍流理论和近地面层湍流相似理论,研究了利用超声风速仪探测的常规气象参数计算折射率结构常数C_n^2的方法,并与温度脉动仪实测的C_n^2结果进行了比较．分析了获得C_n^2的两种不同方法的优缺点,同时对通过超声风速仪虚温计算C_n^2的方法进行了误差分析。分析结果表明,计算得到的C_n^2在一定条件下较好地满足经验关系。由此可以得到,利用超声风速仪获得的气象要素可以对C_n^2进行估算。

According to Kolmogorov-K41 theory, Monin-Obukhov similarity theory and semi-empirical relationships of Wyngaard, the optical turbulence refractive index structure constant Cn^2 is obtained by meteorology factors. But Cn^2 or CT^2 is not easy or precise to measure directly. The meteorology data got from the ultrasonic anemometer were analyzed, and the results showed that the calculated Cn^2 was well agreement with the Cn^2 measured directly by the micro-temperature sensor.