文档介绍：Powder Technology 162 (2006) 190 – 200
ate/powtec
3-putational fluid dynamics for gas and gas-particle flows in a
cyclone with different inlet section angles
S. Bernardo, M. Mori *, . Peres, . Dionı´sio
State University of Campinas, Department of Chemical Processes, School of Chemical Engineering, . Box 6066, CEP 13083-970, Campinas, SP, Brazil
Received 3 February 2005; received in revised form 15 August 2005
Available online 17 February 2006
Abstract
A three-putational fluid dynamics (CFD) Reynolds stress model (RSM) was used to describe the gas and gas–solid flow in a
cyclone with a scroll inlet duct at three different inlet section angles in relation to the cyclone body. The effects of the inlet section angles on the
fluid dynamics inside the cyclone and on the performance parameters (collection efficiency and pressure drop) were analyzed by means of the
finite volume method using putational code and an industrial-sized cyclone for separation of gas-particle phases operated by Votorantim
-
pany. The numerical results show that the value for overall collection efficiency in this work increased to % for the 45 inlet
section angle, while that for the normal inlet duct was % under the same operating conditions.
D 2005 Elsevier . All rights reserved.
Keywords: CFD; Cyclone; RSM; Scroll inlet; Inlet angle
1. Introduction vorticity and in some cases several annular zones of reverse
flow. Theories of confined vortex flow have so far been unable
Gas cyclone separators are widely used in industrial to predict many features of the flow fields observed. The
processes for separation of dust from gas streams or for problem associated with mathematical modelling of the
product recovery. Their design normally has tangential detailed flow patterns involves the solution of strongly
entrance inlets and the cyclones are defined as funnel-shaped coupled, nonlinear partial differential equations of mass and
industrial inertial dev