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CLC number: TB126

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Received: 2005-09-07

Revision Accepted: 2005-09-25

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Journal of Zhejiang University SCIENCE A 2005 Vol.6 No.12 P.1405~1411

http://doi.org/10.1631/jzus.2005.A1405


Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system


Author(s):  Li Dong-hui, Wu Ying-xiang, Li Zhi-biao, Zhong Xing-fu

Affiliation(s):  Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China

Corresponding email(s):   donghui_li@126.com, yxwu@imech.ac.cn

Key Words:  Volumetric fraction, Multiphase flow, Dual-energy &gamma, -ray, Process tomography


Li Dong-hui, Wu Ying-xiang, Li Zhi-biao, Zhong Xing-fu. Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system[J]. Journal of Zhejiang University Science A, 2005, 6(12): 1405~1411.

@article{title="Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system",
author="Li Dong-hui, Wu Ying-xiang, Li Zhi-biao, Zhong Xing-fu",
journal="Journal of Zhejiang University Science A",
volume="6",
number="12",
pages="1405~1411",
year="2005",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2005.A1405"
}

%0 Journal Article
%T Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system
%A Li Dong-hui
%A Wu Ying-xiang
%A Li Zhi-biao
%A Zhong Xing-fu
%J Journal of Zhejiang University SCIENCE A
%V 6
%N 12
%P 1405~1411
%@ 1673-565X
%D 2005
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2005.A1405

TY - JOUR
T1 - Volumetric fraction measurement in oil-water-gas multiphase flow with dual energy gamma-ray system
A1 - Li Dong-hui
A1 - Wu Ying-xiang
A1 - Li Zhi-biao
A1 - Zhong Xing-fu
J0 - Journal of Zhejiang University Science A
VL - 6
IS - 12
SP - 1405
EP - 1411
%@ 1673-565X
Y1 - 2005
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2005.A1405


Abstract: 
volumetric fraction distribution measurement is a constituent part of process tomography system in oil-water-gas multiphase flow. With the technological development of nuclear radial inspection, dual-energy &gamma;-ray techniques make it possible to investigate the concentration of the different components on the cross-section of oil-water-gas multiphase pipe-flow. The dual-energy gamma-ray technique is based on materials attenuation coefficients measurement comprised of two radioactive isotopes of 241Am and 241Cs which have emission energies at 59.5 keV and 662 keV in this project. Nuclear instruments and data acquisition system were designed to measure the material’s attenuation dose rate and a number of static tests were conducted at the Multiphase Laboratory, Institute of Mechanics, Chinese Academy of Sciences. Three phases of oil-water-gas media were investigated for their possible use to simulate different media volumetric fraction distributions in experimental vessels. Attenuation intensities were measured, and the arithmetic of linear attenuation coefficients and the equations of volumetric fractions were studied. Investigation of an unexpected measurement error from attenuation equations revealed that a modified arithmetic was involved and finally the system achieved acceptable accuracy in experimental research.

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Reference

[1] Abouelwafa, M.S.A., Kendall, E.J.M., 1980. The measurement of component ratios in multiphase system using γ-ray attenuation. J. Phy. E: Sci. Instrum., 13:341.

[2] Grassler, T., Wirth, K.E., 2001. Dual-Energy X-Ray Tomography in Process Engineering–A Non-Intrusive Technique to Characterize Vertical Multiphase Flows. 2nd World Congress on Industrial Process Tomography, Hannover, Germany.

[3] Key, M.J., 1999. Gas Microstructure X-Ray Detectors and Tomographic Multiphase Flow Measurement. Ph.D Thesis, University of Surrey.

[4] Minder, W., Liechti, A., 1955. Röntgenphysik. Springer Verlag, Wien.

[5] Morneburg, H.(Ed.), 1995. Bildgebende Systeme für die medizinische Diagnostik. Publicis MCD Verlag, München.

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