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Proceedings Paper

Optical tomography for two-phase flow measurement
Author(s): Nan Zeng; Shurong Lai; Yanbiao Liao
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Paper Abstract

Two phase flows widely exists in many industrial system, much attention has been directed to the use of process tomography in determining the concentration profile in the fluid conveying pipe. This paper preliminarily studies the application of optical tomography in gas-solid two phase flow parameter measurements. We obtain different optical signal as the variation of mass concentration, by means of the variation of diameter of funnel. We find the linear relation between the mass concentration of solid particle and extinctivity, which is consistent with theoretical analysis. In addition, experiments verified that the extinctivity in different position in the direction of light propagation is unconverted, which meets the working conditions of backprojection reconstruction. According to the principles of computer tomography, we obtain the projections of measured 2-D cross section in multi-angle, and read gray scale data of every image element, then the reconstructed image is yielded by backprojection routine. The gray value of each image element corresponds to the mass concentration of the physical position. By means of experiments, we can make a conclusion that it is feasible to obtain the concentration distribution of cross-section by use of optical tomography for measurement.

Paper Details

Date Published: 26 November 2001
PDF: 7 pages
Proc. SPIE 4448, Optical Diagnostics for Fluids, Solids, and Combustion, (26 November 2001); doi: 10.1117/12.449392
Show Author Affiliations
Nan Zeng, Tsinghua Univ. (China)
Shurong Lai, Tsinghua Univ. (China)
Yanbiao Liao, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 4448:
Optical Diagnostics for Fluids, Solids, and Combustion
Carolyn R. Mercer; Soyoung Stephen Cha; Gongxin Shen, Editor(s)

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