气液两相流电容传感器相浓度测量特性

doi:10.11949/j.issn.0438-1157.20150166

化工学报 ›› 2015, Vol. 66 ›› Issue (7): 2402-2410.DOI: 10.11949/j.issn.0438-1157.20150166

气液两相流电容传感器相浓度测量特性

赵安, 韩云峰, 翟路生, 陈春原, 金宁德

天津大学电气与自动化工程学院, 天津 300072

收稿日期:2015-02-02 修回日期:2015-04-02 出版日期:2015-07-05 发布日期:2015-07-05
通讯作者: 金宁德
基金资助:
国家自然科学基金项目(41174109);国家科技重大专项(2011ZX05020-006);天津市应用基础与前沿技术研究计划(青年项目)(14JCQNJC04200)。

Characteristics of phase-concentration measurement for capacitance sensors in gas-liquid two-phase flow

ZHAO An, HAN Yunfeng, ZHAI Lusheng, CHEN Chunyuan, JIN Ningde

School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China

Received:2015-02-02 Revised:2015-04-02 Online:2015-07-05 Published:2015-07-05
Supported by:
supported by the National Natural Science Foundation of China (41174109), the National Science and Technology Major Projects (2011ZX05020-006) and the Tianjin Research Program of Application Foundation and Advanced Technology (Youth Project) (14JCQNJC04200).

摘要/Abstract

摘要：

为了考察两种电容传感器(对壁式及双螺旋式)测量气液两相流相浓度的适应性,搭建了垂直上升气液两相流电容传感器测量系统。实验表明对壁式电容传感器测量分辨率较差,而双螺旋式电容传感器对相浓度具有较高的分辨能力。采用时频分析方法对电容传感器波动信号进行了分析,发现两种电容传感器的时频联合表达均能清晰地表征流型运动特征,并可对流型进行有效辨识。最后,基于双螺旋式电容传感器测量信号,建立了气液两相流漂移模型,取得了对段塞流和混状流分相表观流速较好的预测结果。研究表明,双螺旋式电容传感器在气液两相流流动参数测量上具有较好的应用前景。

关键词: 气液两相流, 相浓度, 对壁式电容传感器, 双螺旋式电容传感器, 测量, 模型

Abstract:

A capacitance measurement system for vertical upward gas-liquid two-phase flow has been established to explore the feasibility for measuring fluid phase-concentration by using concave capacitance sensor and double helix capacitance sensor. The experimental results prove that the concave capacitance sensor has poor measurement resolution, but double helix capacitance sensor shows high resolution in phase-concentration measurement. The fluctuation signals of the two types of capacitance sensors are analyzed by means of time frequency analysis. The time frequency representation can effectively identify flow patterns and characterize their motion clearly. Finally, the drift model of gas-liquid two-phase flow is employed based on the measurement signals of double helix capacitance sensor. Moreover, the phase superficial velocities are estimated for slug and churn flow patterns, and good prediction results are achieved. The results show that the double helix capacitance sensor possesses a good application prospect for measuring the flow parameter in gas-liquid two-phase flows.

Key words: gas-liquid flow, phase-concentration, concave capacitance sensor, double helix capacitance sensor, measurement, model

中图分类号:

TP212.9

赵安, 韩云峰, 翟路生, 陈春原, 金宁德. 气液两相流电容传感器相浓度测量特性[J]. 化工学报, 2015, 66(7): 2402-2410.

ZHAO An, HAN Yunfeng, ZHAI Lusheng, CHEN Chunyuan, JIN Ningde. Characteristics of phase-concentration measurement for capacitance sensors in gas-liquid two-phase flow[J]. CIESC Journal, 2015, 66(7): 2402-2410.

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气液两相流电容传感器相浓度测量特性

Characteristics of phase-concentration measurement for capacitance sensors in gas-liquid two-phase flow

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