Gamma-ray attenuation technique for measuring void fraction in horizontal gas-liquid two-phase flow  

作　　者：LI Zhibiao WU Yingxiang LI Donghui 

机构地区：[1]Institute of Mechanics, the Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Nuclear Science and Techniques》2007年第2期73-76,共4页核技术（英文）

基　　金：Supported by National Natural Science Foundation of China (No. 10572143)

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 sin- gle-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.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.

关 键 词：水平气液二相流 空隙组分 测量 γ射线衰减技术 

分 类 号：O359.1[理学—流体力学] TP391[理学—力学]