AUTHOR=Li Xiaoyu , Shen Geyu , Liu Ping , Gao Jinchen , Gu Ningxin , Meng Zhaoming 

TITLE=The Effect of Different Branch Angles and Different Branch Pipe Sizes on the Onset Law of Liquid Entrainment

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 8 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2020.00095

DOI=10.3389/fenrg.2020.00095

ISSN=2296-598X

ABSTRACT=The T-junction is widely used in nuclear power plant systems. In order to ensure the normal operation of nuclear power plant, it is very important to study the onset point of T-junction liquid entrainment. Previous researches on the onset point of liquid entrainment have been lucubrated, but most of them are for small branch pipes. This paper is about the onset law of large branch pipe. In addition, the effect of branch angle and branch size on the onset point of liquid entrainment was analyzed by comparing with other branch pipe sizes in this paper. The onset phenomenon of liquid entrainment is described and the effect of angle on onset is studied in this research. It is found that the effect of branch angle on the onset point of entrainment is consistent with that of other sizes: as the angle between the branch pipe and the horizontal direction decreases, the onset needs greater Frg on condition of the same hb. The reason is that the decrease of the inertial force in the vertical direction acting on the liquid phase by the gas phase as the angle decreases. In addition, by comparing with the onset point law of liquid entrainment with different branch pipe sizes, we found the effect of branch pipe size on the onset is that the smaller branch pipe needs the greater gas velocity when onset occurs. The reason is that there is different flow resistance of different sizes of branch pipe.