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RESEARCH PAPERS

Flow Measurements in a Model Burner—Part 2

[+] Author and Article Information
D. F. G. Durão, M. V. Heitor, A. L. N. Moreira

Instituto Superior Técnico, Technical University of Lisbon, Department of Mechanical Engineering, 1096 Lisboa, Codex, Portugal

J. Fluids Eng 115(2), 309-316 (Jun 01, 1993) (8 pages) doi:10.1115/1.2910140 History: Received June 02, 1991; Revised November 29, 1992; Online May 23, 2008

Abstract

The isothermal swirling flow in the vicinity of a model oxy-fuel industrial burner is analyzed with laser-Doppler velocimetry together with laser-sheet visualization. The burner consists of a central axisymmetric swirling jet surrounded by sixteen circular jets, simulating the injection of oxygen in practical burners. The results extend those obtained for non-swirling flows, and presented in Part 1 of this paper, to the analysis of the dependence of the mixing efficiency of the burner assembly upon the swirl motion of the central jet and have the necessary detail to allow to assess the accuracy of calculation procedures of the flow in industrial burners. It is shown that swirl attenuates the three-dimensional structure typical of multijet flows in such a way that turbulence production and transport in the near burner zone are dominated by swirl-induced processes.

Copyright © 1993 by The American Society of Mechanical Engineers
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