Experimental Study on the Liquid Slug of Cryogenic Slug Flow in Inclined Tubes  

作　　者：王淑华 张华 王经 

机构地区：[1]School of Mechanical Engineering,Shanghai Jiaotong University

出　　处：《Journal of Shanghai Jiaotong university(Science)》2010年第3期372-376,共5页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China (No. 50476015);the National High Technology Research and Development Program (863)of China (No. 2006AA09Z333)

摘　　要：An experimental study was carried out to understand the phenomena of the boiling flow of liquid nitrogen in inclined tubes with closed bottom by using a high speed motion analyzer.The experimental tubes are 0.018 and 0.014 m inner diameter(ID) and 1.0 m in length.The range of the inclination angle is 45°-90° from the horizontal.The experimental observation on the liquid slug was carried out along the tubes.Statistical method was employed to analyze the experimental data.The experiment analyzed the influences of the inclination angle and the tube diameter on the liquid slug length and velocity.The results show the liquid slug propagation velocity increases with the decrease of inclination angle θ.For all cases,the maximum values of the mean liquid slug lengths were obtained at θ = 60°.The mean liquid slug lengths were greater for large tube at higher tube position.These conclusions provide a basis for further study liquid slug of cryogenic two-phase undeveloped slug flow.An experimental study was carried out to understand the phenomena of the boiling flow of liquid nitrogen in inclined tubes with closed bottom by using a high speed motion analyzer. The experimental tubes are 0.018 and 0.014 m inner diameter （ID） and 1.0 m in length. The range of the inclination angle is 45°-90° from the horizontal. The experimental observation on the liquid slug was carried out along the tubes. Statistical method was employed to analyze the experimental data. The experiment analyzed the influences of the inclination angle and the tube diameter on the liquid slug length and velocity. The results show the liquid slug propagation velocity increases with the decrease of inclination angle θ. For all cases, the maximum values of the mean liquid slug lengths were obtained at θ= 60°. The mean liquid slug lengths were greater for large tube at higher tube position. These conclusions provide a basis for further study liquid slug of cryogenic two-phase undeveloped slug flow.

关 键 词：liquid slug length distribution VELOCITY statistical method inclined tubes 

分 类 号：O359[理学—流体力学]