一、概述临界流文丘里喷嘴法气体流量标准装置工作原理如下:装置在相同时间间隔内,气体连续地流过喷嘴和被校流量计,由于质量守恒,通过喷嘴的质量流量和被校流量计的质量流量相同,比较两者的流量示值可以确定被校流量计的计量性能。二、测量模型1.装置总的累计体积流量为 First, an overview of the critical flow Venturi nozzle gas flow standard device works as follows: Device at the same time interval, the gas flow through the nozzle and the school was the flow meter, due to mass conservation, through the nozzle mass flow and was the school flow meter Of the same mass flow, flow rate can be compared between the two indicators to be measured by the meter performance measurement. Second, the measurement model 1. The total cumulative volume flow device