一、前言本文将介绍一种与流体的组成无关而直接测量质量流量的方法。其测量原理是:使放在流体中的皮托管发生振动,根据这时皮托管的压力导入孔处发生的动压变化测出流动的密度ρ和流体流速 U 之积,即单位截面积上的质量流量ρU,在知道这个值后,将它乘以流体流过 I. INTRODUCTION This article will introduce a method to directly measure the mass flow regardless of the composition of the fluid. The measuring principle is that the pitot tube placed in the fluid is vibrated and the product of the density ρ of fluid flow and the fluid flow velocity U is measured according to the dynamic pressure change occurring at the pressure introducing hole of the pitot tube at this moment, Mass flow rate ρU, after knowing this value, multiplies it by the fluid flow