| Gamma-ray attenuation technique for measuring void fraction in horizontal gas-liquid two-phase flow |
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| 作者姓名： | LI Zhibiao WU Yingxiang LI Donghui |
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| 作者单位： | Institute of Mechanics, the Chinese Academy of Sciences, Beijing 100080, China |
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| 摘 要： | The measurement of void fraction is of importance to the oil industry and chemical industry. In this article, the principle and mathematical method of determining the void fraction of horizontal gas-liquid flow by using a single-energy γ-ray system is described. The γ-ray source is the radioactive isotope of 241Am with γ-ray energy of 59.5 keV. The time-averaged value of the void fraction in a 50.0-mm i.d. transparent horizontal pipeline is measured under various combinations of the liquid flow and gas flow. It is found that increasing the gas flow rate at a fixed liquid flow rate would increase the void fraction. Test data are compared with the predictions of the correlations and a good agreement is found. The result shows that the designed γ-ray system can be used for measuring the void fraction in a horizontal gas-liquid two-phase flow with high accuracy.
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| 关 键 词： | 水平气液二相流 空隙组分 测量 γ射线衰减技术 |
| 收稿时间： | 2007-01-04 |
Gamma-ray attenuation technique for measuring void fraction in horizontal gas-liquid two-phase flow |
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| LI Zhibiao WU Yingxiang LI Donghui.Gamma-ray attenuation technique for measuring void fraction in horizontal gas-liquid two-phase flow[J].Nuclear Science and Techniques,2007,18(2):73-76. |
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| Authors: | LI Zhibiao WU Yingxiang LI Donghui |
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| Affiliation: | 1. Tianjin Key Laboratory of Process Measurement and Control, School of Electrical and Information Engineering, Tianjin University, Tianjin, China;2. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education, School of Electrical and Information Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China;3. Laboratory for Flow Control, Division of Energy and Environmental Systems, Faculty of Engineering, Hokkaido University, Hokkaido, Japan;1. Department ofEngineering, Universidade Federal de Lavras (UFLA), Lavras, MG, Brazil;7. Research and Development Center (CENPES), Petrleo Brasileiro S.A. (Petrobras), Rio de Janeiro, RJ, Brazil;71. Department ofEngineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil |
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| Abstract: | The measurement of void fraction is of importance to the oil industry and chemical industry. In this article,the principle and mathematical method of determining the void fraction of horizontal gas-liquid flow by using a single-energy γ-ray system is described. The γ-ray source is the radioactive isotope of 241Am with γ-ray energy of 59.5 keV. The time-averaged value of the void fraction in a 50.0-mm i.d. transparent horizontal pipeline is measured under various combinations of the liquid flow and gas flow. It is found that increasing the gas flow rate at a fixed liquid flow rate would increase the void fraction. Test data are compared with the predictions of the correlations and a good agreement is found. The result shows that the designed γ-ray system can be used for measuring the void fraction in a horizontal gas-liquid two-phase flow with high accuracy. |
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| Keywords: | γ-rays Single-energy Void fraction Two-phase flow gas flow rate horizontal void fraction measuring technique used high accuracy result Test data correlations good increasing fixed would increase transparent pipeline liquid value |
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