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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue (12): 9-    DOI: 10.1631/jzus.2005.A1416
    
Study on absorption coefficients of dual-energy γ-rays in determining phase fractions of multiphase flows
Li Zhi-biao, Li Dong-hui, Wu Ying-xiang
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China; Graduate School, Chinese Academy of Sciences, Beijing 100080, China
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Abstract  This paper discusses the principle and mathematical method to measure the phase fractions of multiphase flows by using a dual-energy gamma-ray system. The dual-energy gamma-ray device is composed of radioactive isotopes of 241Am and 137Cs with emission energies of 59.5 keV and 662 keV respectively. A rational method to calibrate the absorption coefficient was introduced in detail. The statistical error has been analyzed on the basis of the accurate absorption coefficient which enables determination phrase fractions almost independent of the flow regime. Improvement has been achieved on the measurement accuracy of phase fractions.

Key words： Absorption coefficient      γ-rays      Dual-energy      Phase fraction     
Received: 07 September 2005     
CLC:  TB126  
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Li Zhi-biao
Li Dong-hui
Wu Ying-xiang
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Li Zhi-biao, Li Dong-hui, Wu Ying-xiang. Study on absorption coefficients of dual-energy γ-rays in determining phase fractions of multiphase flows. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6(12): 9-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A1416     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I12/9

[1] 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 (Applied Physics & Engineering), 2005, 6(12): 7-.