Distribution of void fraction for gas-liquid slug flow in an inclined pipe

Distribution of void fraction for gas-liquid slug flow in an inclined pipe 1 first-author 2 2 College of Environmental and Energy Engineering, Beijing Polytechnic University, Beijing 100022 College of Environmental and Energy Engineering, Beijing Polytechnic University, Beijing 100022 State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049 State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049 In order to investigate the effect of inclination angle on the spatial distribution of phases, experiments on gas-liquid two-phase slug flow in an inclined pipe were carried out by using the optical probe and an EKTAPRO 1000 high speed motion analyzer. It has been demonstrated that the inclination angle and the mixture velocity are important parameters to influence the distribution of void fraction for upward slug flow in the inclined pipe. At high mixture velocity, the gas phase profile is axial symmetry in the cross-section of the pipe. This is similar to that for vertical slug flow. In contrast, most of the gas phase is located near the upper pipe wall at low mixture velocity. By measuring the axial variation of void fraction along the liquid slug, it can be concluded that there is a high void fraction wake region with length of 3~4D in the front of liquid slug. In the fully developed zone of liquid slug, the peak value of the void fraction is near the upper wall. Gas-liquid slug flow Void fraction Inclined pipe References Fabre J , Line A. Ann Rev Fluid Mech , 1992 , 24 : 21 ~ 46 Ann Rev Fluid Mech Akagawa K , Sakaguchi T. Bull Japan Soc Mech Eng , 1966 , 9 ( 33 ): 104 ~ 110 Bull Japan Soc Mech Eng Mao Z S , Dukler A E. Exper Fluids , 1989 , 8 : 169 ~ 182 Exper Fluids Van Hout R , Shemer L , Barnea D. Int J Multiphase Flow , 1992 , 18 : 831 ~ 845 Int J Multiphase Flow Felizola H , Shoham O. J Energy Resour Technol , 1995 , 117 : 7 ~ 12 J Energy Resour Technol Xia G D. Investigation on the hydrodynamic characteristics of upward gas-liquid slug flow in vertical and inclined tubes ( Ph. D. Thesis, in Chinese ), Xi'an Jiaotong University , China , 1996 Investigation on the hydrodynamic characteristics of upward gas-liquid slug flow in vertical and inclined tubes Xia G D , Zhou F D , Hu M S. Prog Nat Sci (in Chinese) , 1998 , 8 : 554 ~ 562 Prog Nat Sci (in Chinese) Reinecke N , Petritsch G , Boddem M et al . Int J Multiphase Flow , 1998 , 24 : 617 ~ 634 Int J Multiphase Flow O359 + .1, V211.1 + 7, TL334 2000-05-29 2001-05-01 2021-02-05 2001 Nuclear Science and Techniques 2 12