Numerical and experimental investigations of gas–liquid dispersion in an ejector

Abstract The effects of the ejector geometry (nozzle diameter and mixing chamber) and the operating conditions (liquid circulating rate, liquid level in column) on the hydraulic characteristics in a rectangular bubble column ( 0.22 × 0.26 × 1.3 m 3 ) with a horizontal flow ejector were determined. The gas phase holdup increases with increasing liquid circulating rate but decreases with increasing liquid level in the column. In the multiphase CFD simulation with the mixture model and the experiments, the gas suction rate increases with increasing liquid circulating rate. However, the gas suction rate decreases with increasing the liquid level in the column and nozzle diameter. The predicted values from the CFD simulation are well accord to the experimental data.

[1]  Vishwas G. Pangarkar,et al.  GAS INDUCTION AND HOLD-UP CHARACTERISTICS OF LIQUID JET LOOP REACTORS , 1987 .

[2]  K. V. Raghavan,et al.  Mass transfer and hydrodynamic characteristics of loop reactors with downflow liquid jet ejector , 1987 .

[3]  M. Manninen,et al.  On the mixture model for multiphase flow , 1996 .

[4]  Andrew Ooi,et al.  CFD analysis of ejector in a combined ejector cooling system , 2005 .

[5]  V. Linek,et al.  Effect of the ejector configuration on the gas suction rate and gas hold-up in ejector loop reactors , 1997 .

[6]  Saffa Riffat,et al.  CFD modelling and experimental investigation of an ejector refrigeration system using methanol as the working fluid , 2001 .

[7]  Da-Wen Sun,et al.  RECENT DEVELOPMENTS IN THE DESIGN THEORIES AND APPLICATIONS OF EJECTORS - A REVIEW , 1995 .

[8]  P. Spalart A One-Equation Turbulence Model for Aerodynamic Flows , 1992 .

[9]  Yann Bartosiewicz,et al.  Numerical assessment of ejector operation for refrigeration applications based on CFD , 2006 .

[10]  M Ouzzane,et al.  Model development and numerical procedure for detailed ejector analysis and design , 2003 .

[11]  A. K. Mitra,et al.  Momentum transfer in a horizontal liquid‐jet ejector , 1972 .

[12]  Aly Karameldin,et al.  Modelling and simulation of steam jet ejectors , 1999 .

[13]  Ashwin W. Patwardhan,et al.  Hydrodynamic aspects of ejectors , 2005 .

[14]  Yann Bartosiewicz,et al.  Numerical and Experimental Investigations on Supersonic Ejectors , 2005 .

[15]  T. Sriveerakul,et al.  Performance prediction of steam ejector using computational fluid dynamics: Part 1. Validation of the CFD results , 2007 .

[16]  G. Wallis One Dimensional Two-Phase Flow , 1969 .