Artículos de revistas
Numerical And Experimental Study Of An Axially Induced Swirling Pipe Flow
Registro en:
Numerical And Experimental Study Of An Axially Induced Swirling Pipe Flow. Elsevier Science Inc, v. 53, p. 81-90 JUN-2015.
0142-727X
WOS:000355367500007
10.1016/j.ijheatfluidflow.2015.02.003
Autor
Rocha
Andre Damiani; Bannwart
Antonio Carlos; Ganzarolli
Marcelo Moreira
Institución
Resumen
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) In-line flow segregators based on axial induction of swirling flow have important applications in chemical, process and petroleum production industries. In the later, the segregation of gas bubbles and/or water droplets dispersed into viscous oil by swirling pipe flow may be beneficial by either providing a pre-separation mechanism (bubble and/or drop coalescer) or, in the case of water-in-oil dispersions, by causing a water-lubricated flow pattern to establish in the pipe (friction reduction). Works addressing these applications are rare in the literature. In this paper, the features and capabilities of swirling pipe flow axially induced by a vane-type swirl generator were investigated both numerically and experimentally. The numerical analysis has been carried out using a commercial CFD package for axial Reynolds numbers less than 2000. Pressure drop, tangential and axial velocity components as well as swirl intensity along a 5 cm i.d. size and 3 m long pipe were computed. Single phase flow experiments have been performed using a water-glycerin solution of 54 mPa s viscosity and 1210 kg/m(3) density as working fluid. The numerical predictions of the pressure drop were compared with the experimental data and agreement could be observed within the range of experimental conditions. The experiments confirmed that swirl flow leads to much higher friction factors compared with theoretical values for non-swirl (i.e. purely axial) flow. Furthermore, the addition of a conical trailing edge reduces vortex breakdown., Visualization of the two-phase swirling flow pattern was achieved by adding different amounts of air to the water-glycerin solution upstream the swirl generator. (C) 2015 Elsevier Inc. All rights reserved. 53
81 90 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) CEPETRO Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)