利用孔板流量计测量流体流量时,并不能直接读出流量数值,而是根据测得的孔口压强降,用试差方法计算,或者用由称量法或标准流量计校核得到的流量与压差计读数的关系曲线(即校正曲线图)查取。本文提出一个相当准确的近似解析法,可计算出流量的数值。通过孔板流量计的流体质量流量计算公式为 When using orifice flowmeters to measure fluid flow, it is not straightforward to read the flow rate value, but instead of using the measured orifice pressure drop, using a trial and error method, or by using a flow rate calibrated by a weighing method or a standard flow meter And the differential pressure meter reading curve (ie, calibration curve) access. This paper presents a fairly accurate approximate analytical method that can calculate the value of the flow rate. Flow through the orifice flow meter mass flow formula is