三维超声波换能器测风阵列研究

针对三维测风技术中常用的垂直正交测风阵列在消除阴影效应影响方面的缺陷,根据流场特性,设计了一种基于特殊四面体棱边构建的非正交测风阵列。该阵列旨在降低尾迹区湍流对测风路径平均风速的影响,并且对绕流干扰严重的测风路径进行数据补偿。利用GAMBIT软件建立测风阵列模型,通过FLUENT软件改变流场内气体流速和雷诺数等环境参数,仿真两种阵列在低速层流区和高速湍流区的不同性能,获取了速度分布云图和三组换能器所在路径速度折线图,说明了非正交测风阵列能够有效提高三维测风的精度。

Study on ultrasonic transducer array for three dimensional wind

The vertical wind array commonly used in three dimensional wind measurement technology has defects in eliminating the shadow effect. This paper designs a non orthogonal wind array based on special tetrahedron edges according to the characteristics of flow field. The array is designed to reduce the influence of wake region turbulence on the mean wind velocity of the wind path, and to compensate the wind path which the round flow interferes severely. The wind array is modeled with GAMBIT software, and the flow field of gas velocity and Reynolds number of different environmental parameters are changed in FLUENT software to simulate the different performances of the two arrays in the low velocity laminar flow region and the high velocity turbulence region. The cloud chart of velocity distribution and the velocity line graph based on the path of three groups of transducers are obtained to prove that the non orthogonal array can improve the accuracy of the three dimensional wind measurement.