风杯式风速传感器启动风速校准实验箱的分析与设计

Analysis and design of the experiment box for the starting wind velocity threshold calibration of cup anemometer

针对风杯式风速传感器启动风速现场实时校准问题,分析了影响风杯式风速传感器启动风速的因素,提出了现场测量启动风速的方法,基于此方法设计了启动风速校准实验箱,为获得最优实验箱结构参数,通过Fluent软件分别研究了不同结构的动力段、整流段以及收缩段对实验箱流场形态的影响,选取合适的结构,确定了实验箱结构在不同风扇转速下的流场形态,结果表明:所设计的实验箱出口段气流速度平稳,方向一致,满足校准需求。

Aiming at the problem of on-site real-time calibration of the starting wind velocity threshold of cup anemometer, this paper an- alyzes the influence factors of the starting wind velocity threshold of cup anemometer. A new method for on-site measuring the starting wind velocity threshold is put forward. Based on this method, the experiment box for the starting wind velocity threshold calibration is designed. In order to obtain the optimal structure parameters of the experiment box, the fluent software is adopted to study the influence of the power section, rectifying section and contraction section in different structures on the flow field characteristics of the experiment box. The appropriate structure is selected, and the flow field characteristics of the experiment box are determined at different fan speeds. The results show that the air flow velocity is stable and the direction is consistent in the outlet section of the designed experiment box, which meets the calibration requirement.