The Design of a Conductance Probe for Measuring Liquid-film Thickness in Gas-liquid Two-phase Flow
A conductance probe and the related electronic circuits are developed and studied experimentally for measuring the liquid-film thickness in gas-liquid two-phase flow. The device consists of electrode pairs inserted in horizontal circular pipes and the related electronics. An A.C. carrier voltage of 60 kHz frequency is applied to a Wheatstone bridge in which the load impedance of electrode pairs occupies one branch, and then a balanced demodulator converts the A.C. signal into a D.C. signal proportional to the impedance of the liquid-film. The performance of the probe was investigated under stratified flow regime with air and tap water, and the results of experiment have indicated that the measurement errors almost fall within ±13.2％. The error is mainly due to without considering the effects of the temperature and liquid properties.
conductance probe electronic circuit liquid-film thickness electrode pairs Wheatstone bridge
HUA Chenquan WANG Changming GENG Yanfeng
College of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China Coll College of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China College of Information & Control Engineering, China University of Petroleum, Dongying, China
国际会议
第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)
重庆
英文
2882-2885
2009-08-01（万方平台首次上网日期，不代表论文的发表时间）