Title: Gas mixing in cylindrical chambers after radial jets injection

Authors: A. Nirmolo, H. Woche, E. Specht, R. Praetor, R. Skroch

Addresses: Institute of Fluid Dynamics and Thermodynamics, Otto-von-Guericke University of Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany. ' Institute of Fluid Dynamics and Thermodynamics, Otto-von-Guericke University of Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany. ' Institute of Fluid Dynamics and Thermodynamics, Otto-von-Guericke University of Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany. ' Institute of Fluid Dynamics and Thermodynamics, Otto-von-Guericke University of Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany. ' Lurgi Bischoff GmbH, Gwinnerstrasse 27 – 33, 60388 Frankfurt, Germany

Abstract: Multiple jets injected radially into a cylindrical chamber have been numerically and experimentally studied. The chamber diameter was varied from 0.3 m to 3 m and the number of nozzles from 4 to 32. The optimum condition was obtained at a penetration depth (h/R) of 0.6 which occurred for a normalised momentum flux ratio (J/n²) of 0.3. The optimum mixing quality for high number of nozzles becomes nearly independent of J/n² in the range greater than 0.3. The larger the diameter of the cylindrical chamber is, the higher must be the number of nozzles to ensure similar mixing quality.

Keywords: gas mixing; cylindrical chambers; radial jets; cross-flow; penetration depth; nozzles; momentum flux ratio; nozzle numbers; CFD; computational fluid dynamics.

DOI: 10.1504/PCFD.2007.015777

Progress in Computational Fluid Dynamics, An International Journal, 2007 Vol.7 No.8, pp.447 - 456

Published online: 14 Nov 2007 *

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