Gas and Liquid Two-Phase Flow Injected Directly into Vertical Mini-Channel

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Koichi Terasaka²  Satoko Fujioka²  Takashi Goshima¹ 

[1] School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University;Department of Applied Chemistry, Faculty of Science and Technology, Keio University

关键词: Mini-Channel;    Two-Phase Flow Pattern;    Pressure Drop;    Injector;   

DOI  :  10.1252/jcej.12we061

来源: Maruzen Company Ltd

【 摘 要 】

References(13)When both a gas and liquid are simultaneously introduced from an injector into a vertical mini-channel, the hydrodynamic pattern in the channel depends on the construction of the injectors. To evaluate the effect of the injector on the two-phase flow pattern, direct injection has been compared to a co-flow pre-injection and a cross-flow pre-injection in recent study. For the three different injections, the flow pattern regime maps, which are described as the relation between the superficial liquid velocity and superficial gas velocity, were developed. The direct injector realized better dispersion of uniform bubble flow, various flow patterns and stable slug flow than the other injections. To clarify the two-phase flow dynamics in a vertical mini-channel attached to a direct injector, the frictional pressure drop has been measured and illustrated by a contour. The frictional pressure drop through a mini-channel was correlated using the equation of Chisholm. The two-phase friction multiplier was plotted versus the Lockhart–Martinelli parameter. The constant of the Chisholm equation has been evaluated for the two-phase flow such as bubbly flow and slug flow. By using the equation, the frictional pressure drop through a mini-channel can be well predicted.

【 授权许可】

Unknown