槽式孔板的湿气分层流差压预测模型

doi:10.3969/j.issn.0438-1157.2013.04.005

化工学报 ›› 2013, Vol. 64 ›› Issue (4): 1163-1169.DOI: 10.3969/j.issn.0438-1157.2013.04.005

槽式孔板的湿气分层流差压预测模型

郑金吾, 张一晓, 耿艳峰

中国石油大学信息与控制工程学院,山东青岛 266580

收稿日期:2012-07-08 修回日期:2012-08-31 出版日期:2013-04-05 发布日期:2013-04-05
通讯作者: 郑金吾
作者简介:郑金吾(1958—),男,硕士,教授。
基金资助:
国家自然科学基金项目(61071041)。

Prediction of differential pressure of slotted orifice for wet gas stratified flow

ZHENG Jinwu, ZHANG Yixiao, GENG Yanfeng

School of Information and Control Engineering, China University of Petroleum, Qingdao 266580, Shandong, China

Received:2012-07-08 Revised:2012-08-31 Online:2013-04-05 Published:2013-04-05
Supported by:
supported by the National Natural Science Foundation of China(61071041).

摘要/Abstract

摘要： 槽式孔板是一种新型的气液两相流测量元件,与标准孔板相比,槽式孔板具有前后直管段要求低、差压信号平稳、上游液相无累积等优点。通过对槽式孔板的局部阻力进行分析,槽式孔板总压降主要由摩阻压降和加速压降两部分组成。基于气液两相流体流经槽式孔板的流动机理,利用动量守恒关系式和能量守恒关系式计算摩阻压降和加速压降,建立了槽式孔板的分层流差压预测模型。以空气/水为介质,进行了一系列实验,实验结果表明,孔径比为0.75、0.6、0.5的槽式孔板的平均相对误差分别为6.45%、11.06%、12.52%,为湿气计量算法的完善提供了参考。

关键词: 槽式孔板, 湿气, 机理建模, 计量

Abstract: Slotted orifice is a new type of flow measuring element for gas-liquid two-phase flow measurement, Comparing with standard orifice,slotted orifice has a lot of advantages.It has less strict requirement for straight pipes upstream and downstream, its differential pressure signals are steady and there is no accumulation of liquid phase in the upstream.By analyzing local resistance of the slotted orifice, total pressure drop mainly consisted of frictional pressure drop and acceleration pressure drop.Based on flow mechanism of gas-liquid two-phase flow passing slotted orifice, frictional pressure drop and acceleration pressure drop could be calculated by momentum conservation equations and mass conservation equations, then the differential pressure drop prediction model could be developed.A series of experiments were carried out on air-water two-phase flow.According to the experimental results, mean relative error of slotted orifice with beta ratio of 0.75, 0.6, 0.5 were 6.45%, 11.06%, 12.52%.This work provided a reference for perfecting the algorithm of wet gas metering.

Key words: slotted orifice, wet gas, mechanism modeling, measurement

中图分类号:

TH814
O359

郑金吾, 张一晓, 耿艳峰. 槽式孔板的湿气分层流差压预测模型[J]. 化工学报, 2013, 64(4): 1163-1169.

ZHENG Jinwu, ZHANG Yixiao, GENG Yanfeng. Prediction of differential pressure of slotted orifice for wet gas stratified flow[J]. CIESC Journal, 2013, 64(4): 1163-1169.

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槽式孔板的湿气分层流差压预测模型

Prediction of differential pressure of slotted orifice for wet gas stratified flow

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