Title: Numerical simulation of gas-liquid two-phase flow in recycling cyclone separator with different structure

Authors: Lixin Liu; Wei Zhang

Addresses: College of Automobile and Transportation, Qingdao Technological University, Qingdao, Shandong, 266520, China ' College of Computer Engineering, Qingdao Technological University, Qingdao, Shandong, 266520, China

Abstract: A numerical study of the droplet motion in the recycling cyclone separator is presented in this paper. The Reynolds stress model (RSM) for the single-phase and the coupling discrete random walk model are adopted for the two-phase. The pressure drop, separation efficiency velocity and turbulence parameters of the gas flow are described to study the effects of different structures on the separation performance of cyclones. The results show that recycling line can improve the efficiency of the recycling cyclone separator and reduce the pressure drop. The gap width and the size of baffle plate affect the separation property of the recycling cyclone. The rectangular-shaped intake behaves better than the cylinder-shaped one. However, the skirted baffle has little effect on the recycling cyclone separator. All the structural features make for a better understanding of the separation mechanism in the recycling cyclone separator. The numerical results are compared with the experimental data and good agreement can be observed.

Keywords: recycling cyclone separator; Reynolds stress model; RSM; recycling line; gap width; baffle plate; numerical simulation; gas-liquid two-phase flow; droplet motion; modelling; random walk model; pressure drop; separation efficiency velocity; turbulence parameters; gas flow.

DOI: 10.1504/IJMIC.2015.070658

International Journal of Modelling, Identification and Control, 2015 Vol.23 No.4, pp.316 - 327

Available online: 15 Jul 2015 *

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