湿气流量测量新方法

A New Method of Wet Gas Flow Measuring

基于均相流假设,根据文丘里管两相流流量测量模型和空隙率定义式,结合气液两相流的差压瞬时值、流量瞬时值和空隙率瞬时值间存在的时间平均值关系,推导了湿气流量测量机理模型,并根据Froude准数对模型进行了修正。本文建立的湿气流量测量模型形式上为一经气、液密度和Froude准数修正的节流式流量测量关系式,该关系式将为湿气流动机理的研究提供有益的借鉴。实验结果表明,本文建立的湿气流量测量模型可用于湿气流量的测量,流量测量误差小于5%,满足实际测量的要求。

Basing on the homogeneous flow assumption,the Venturi principle for two-phase flow measurement and void fraction definition,and the relationship between the instantaneous differential pressure and the flow and the void fraction in time domain,a wet gas flow measurement model was derived and then modified with Froude parameter.It presented the Orifice flow relationship depending upon gas-liquid density and Froude parameter and benefited the research on wet gas flow mechanism.Experimental results show its availability and measurement error of less than about 5%.