一、问题的提出目前,在配有风机设备(如低温仓、清粮机、热风炉、通风采暖以及空调等)的流体流速、流量和热量的测定中,一般都采用热球式风速仪和毕托管进行测量。利用热球式风速仪测量流体参数时,可以直接读出流速值,再通过计算可以得出流量和热量值。因此,使用热球式风速仪测量流体的参数,可说是测量简单,读数直观,计算简捷。但 First, the issue put forward At present, with the fan equipment (such as low temperature warehouse, grain machines, stoves, ventilation heating and air conditioning, etc.) of the fluid velocity, flow and heat determination, the general use of hot ball anemometer and Bi Tu tube for measurement. When using a hot ball anemometer to measure fluid parameters, you can read the flow rate directly, and then calculate the flow rate and calorific value. Therefore, the use of a hot ball anemometer to measure the fluid parameters can be said that the measurement is simple, intuitive readings, calculation simple. but