Title :
Two methods for measurement of gas-liquid flows in vertical upward pipe using dual-plane ERT system
Author :
Yanbin, Xu ; Feng, Dong ; Huaxiang, Wang ; Xutong, Qiao
Author_Institution :
Dept. of Autom., Tianjin Univ., China
Abstract :
A dual-plane Electrical Resistance Tomography (ERT) system is employed to combine ERT with cross correlation technique to measure the gas phase volumetric flowrate in gas-liquid flows in vertical upward pipe. According to the uniformity of the local void fraction distribution and the velocity distribution of gas phase, pixel-correlation method and eigenvalue-correlation method are put forward to estimate the gas phase volumetric flowrate. This paper compares the two estimate methods and makes preliminary study of the applicability of the two methods. Two experiments were designed to evaluate the validity of those two estimate methods. Experimental results were presented to analyze their characters respectively.
Keywords :
computerised tomography; correlation methods; eigenvalues and eigenfunctions; electric impedance imaging; electric resistance measurement; feature extraction; flow visualisation; image reconstruction; mechanical engineering computing; physics computing; pipe flow; two-phase flow; cross correlation technique; dual-plane electrical resistance tomography; eigenvalue-correlation method; feature extraction; gas phase volumetric flowrate; gas-liquid flow measurement; image reconstruction; local void fraction distribution uniformity; pixel-correlation method; two-phase flow; vertical upward pipe; Dispersion; Electric resistance; Electric variables measurement; Electrical resistance measurement; Fluid flow measurement; Monitoring; Phase measurement; Q measurement; Velocity measurement; Volume measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE
Print_ISBN :
0-7803-8248-X
DOI :
10.1109/IMTC.2004.1351551
