3 D Computational Fluid Dynamics For Gas And Gas Particle Flows In A Cyclone With Different Inlet Section Angles英文电子书.pdf

3 D Computational Fluid Dynamics For Gas And Gas Particle Flows In A Cyclone With Different Inlet Section Angles英文电子书.pdf

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Powder Technology 162 (2006) 190 – 200 /locate/powtec 3-D computational fluid dynamics for gas and gas-particle flows in a cyclone with different inlet section angles S. Bernardo, M. Mori *, A.P. Peres, R.P. Dionı´sio State University of Campinas, Department of Chemical Processes, School of Chemical Engineering, P.O. 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-dimensional computational 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 a computational code and an industrial-sized cyclone for separation of gas-particle phases operated by Votorantim Cimentos Company. The numerical results show that the value for overall collection efficiency in this work increased to 77.2% for the 45- inlet section angle, while that for the normal inlet duct was 54.4% under the same operating conditions. D 2005 Elsevier B.V. All rights reserved. Keywords: CFD; Cyclone; RSM; Scroll inlet; Inlet angle 1. Introduction vorticity and in some cases several annular zones of reverse

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