超声波换能器测风阵列的优化设计

为了减弱风场在超声波换能器测风阵列中产生湍流,降低湍流对信号采集精度的影响,分析了换能器阵列影响流场的因素,采用6个收发一体的超声波换能器,设置独立的3条测风路径,根据不同来流方向,建立了风速计算模型,结合换能器晶片的工作特性,改进测风阵列的设计,降低了阴影效应的影响。利用FLUENT软件,通过设置不同的雷诺数、来流风速和风向参数,仿真了流场在阵列中分布特性,得到阵列速度云图和测风路径速度变化图,验证了改进后的测风阵列性能有效提升,说明了所设计阵列能满足测风精度提高的要求。

Optimal Design of Ultrasonic Transducer Array for Wind Measurement

In order to weaken the strength of turbulence generated by ultrasonic transducer in wind field and also reduce the effect of turbulence on the accuracy of ultrasonic transducer signal acquisition, in this paper the factors that transducer array influences flow field are analyzed and a new transducer array is designed. This new array consists of six transceiver integrated ultrasonic transducers and three independent wind measurement paths. According to different flow direction, the wind speed calculation model is established; combining the working characteristics of transducer chip the design of the wind measurement array is improved and the influence of shadow effect is reduced. Several typical arrays are selected to compare and analyze the flow field distribution features in the array by changing Reynolds number, wind speed and direction parameters using the FLUENT software. The wind speed nephogram of the array and speed curve of the wind measurement paths are obtained, which verifies that the performance of the improved wind measurement array is effectively enhanced. The designed array meets the requirements of improving wind measurement accuracy.