基于Chisholm模型的V锥流量计气液分层流测量新模型

doi:10.11949/j.issn.0438-1157.20180136

化工学报 ›› 2018, Vol. 69 ›› Issue (8): 3428-3435.DOI: 10.11949/j.issn.0438-1157.20180136

基于Chisholm模型的V锥流量计气液分层流测量新模型

贺登辉^1,2, 陈森林¹, 白博峰²

1 西安理工大学省部西北旱区生态水利国家重点实验室, 陕西西安 710048;
2 西安交通大学动力工程多相流国家重点实验室, 陕西西安 710049

收稿日期:2018-01-30 修回日期:2018-03-30 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: 白博峰
基金资助:
国家自然科学基金项目（51709227）；国家杰出青年科学基金项目（51425603）。

New model for measuring stratified gas-liquid flow by Chisholm-model-based V-cone flowmeter

HE Denghui^1,2, CHEN Senlin¹, BAI Bofeng²

1 State Key Laboratory of Eco-hydraulic in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, Shaanxi, China;
2 State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

Received:2018-01-30 Revised:2018-03-30 Online:2018-08-05 Published:2018-08-05
Supported by:
supported by the National Natural Science Foundation of China (51709227) and the National Science Fund for Distinguished Young Scholars of China (51425603).

摘要/Abstract

摘要：

针对V锥流量计应用Chisholm模型测量气液分层流时误差较大的问题，采用节流比分别为0.55、0.65和0.75的三个V锥流量计，实验研究了高含气率（体积含气率>95%）气液分层流条件下，气、液相流量、压力以及节流比对Chisholm模型修正因子C的影响规律，并建立气液分层流测量模型。结果表明，修正因子C随Lockhart-Martinelli参数X_LM的增大而单调递减，但基本不受压力和气体密度Froude数的影响，而节流比变化则对C有一定影响；建立了C随X_LM变化的测量模型，获得了不同节流比的V锥流量计气液分层流测量新模型。对于节流比为0.55和0.65的V锥流量计，分别在94.6%和88.6%置信水平下，新模型预测的气相流量相对误差不超过±3.0%；节流比为0.75时，在91.7%置信水平下，预测的气相流量相对误差不超过±4.0%。

关键词: 多相流, 两相流, 气液分层流, 测量, Chisholm模型, V锥流量计

Abstract:

Large errors are usually observed when Chisholm model is used in V-cone flowmeter to measure stratified gas-liquid flow rate. Three V-cone flowmeters with throttle ratios of 0.55, 0.65 and 0.75 were used to study stratified gas-liquid flow at gas volume fraction of more than 95%. The effects of gas and liquid flow rates, operating pressure and throttle ratio on correction factor C of the Chisholm model were analyzed and new model for measuring stratified gas-liquid flow was developed. Correction factor C was monotonically decreased with increase of Lockhart-Martinelli, X_LM, but was hardly affected by pressure and the gas densiometric Froude number. However, C was somehow affected by throttle ratio. The relationship between C and X_LM was obtained and new models for three V-cone flowmeters to measure stratified flow were developed. The relative standard error of the predicted gas flow rate was with ±3.0% for V-cone flowmeters with throttle ratios of 0.55 and 0.65 under confidence level of 94.6% and 88.6%, respectively, while that was with ±4.0% under 91.7% confidence level for V-cone flowmeter with throttle ratio of 0.75.

Key words: multiphase flow, two-phase flow, stratified gas-liquid flow, measurement, Chisholm model, V-cone flowmeter

中图分类号:

TK313

贺登辉, 陈森林, 白博峰. 基于Chisholm模型的V锥流量计气液分层流测量新模型[J]. 化工学报, 2018, 69(8): 3428-3435.

HE Denghui, CHEN Senlin, BAI Bofeng. New model for measuring stratified gas-liquid flow by Chisholm-model-based V-cone flowmeter[J]. CIESC Journal, 2018, 69(8): 3428-3435.

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基于Chisholm模型的V锥流量计气液分层流测量新模型

New model for measuring stratified gas-liquid flow by Chisholm-model-based V-cone flowmeter

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