长槽道内文丘里湿气流量测量虚高特性

Wet gas performance of long slot internal Venturi meter

为了研究节流装置结构参数对湿气流量测量虚高特性的影响,设计了与传统文丘里管结构相对的边壁绕流型长槽道内文丘里节流装置,并对其湿气测量特性进行了实验研究,对比分析了节流装置水力直径和管道液相分布对虚高的影响。实验研究和理论分析表明,气相对液相加速的摩阻压降是影响虚高的重要因素,在相同工况条件下,节流装置流通区域的水力直径越小,液相分布越均匀,气液两相混合越充分,虚高值越大。对节流装置结构参数对虚高的影响进行了较为细致的分析,为基于边壁绕流型节流装置的湿气流量计的结构优化设计奠定了基础。

In order to investigate the structure parameters effect on wet gas performance of throttling device,a long slot internal Venturi throttling device with the fluid restricted to the periphery of the pipe which is relative to the traditional Venturi is designed,and the wet gas metering characteristic is studied based on experiment,the hydraulic diameter and the liquid dispersion effects on the over-reading are analyzed relatively.The experimental study and theoretical analysis show that the friction pressure loss due to the acceleration effect of gas to liquid is a major reason behind the over-reading,under the same flow conditions,the over-reading tends to increase with smaller hydraulic diameter of the throttling device and more homogeneous mixed gas and liquid.The result analyze the geometry structure parameters effect on wet gas performance of throttling device in detail and supply important design values for optimizing the structure of the wet gas flow meter based on the throttling devices that restrict the fluid to the periphery of the pipe.