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Proceedings Paper

Application of imaging techniques to the study of vortex-flame interactions
Author(s): Gregory J. Fiechtner; Paul-Henri Renard; James R. Gord; Keith D. Grinstead; Campbell D. Carter; Juan Carlos Rolon
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Paper Abstract

A thorough understanding of turbulent reacting flows is essential to the continued development of practical combustion systems. Unfortunately, these studies represent a tremendous research challenge owing to the inherent complexity of such flows. In an effort to reduce the complexity of these systems while capturing the essential features that define the physics and chemistry of turbulent reacting flows, we have been studying the interaction of a vortex with a laminar flame. The experimental apparatus includes a piston-cylinder device configured to provide a controlled toroidal vortex. The generated vortex/jet interacts with a nonpremixed hydrogen-air flame supported in a counterflow burner. The counterflow configuration permits precise selection of the flame and the associated strain field. Vortex characterization is essential to interpreting the experimental observation and accomplishing numerical modeling of vortex-flame interactions. Two-color particle- image velocimetry (PIV) has been employed to characterize the vortex and to describe the underlying counterflow velocity field. The hydroxyl (OH) layer produced by the flame is imaged using planar laser-induced fluorescence (PLIF). The PIV and PLIF measurements of OH are performed simultaneously. A distinct annular extinction of the OH layer is observed, in good agreement with previous computational modeling predictions for the apparatus.

Paper Details

Date Published: 13 October 1999
PDF: 12 pages
Proc. SPIE 3783, Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids, (13 October 1999); doi: 10.1117/12.365745
Show Author Affiliations
Gregory J. Fiechtner, Air Force Research Lab. and Innovative Scientific Solutions, Inc. (United States)
Paul-Henri Renard, Ecole Centrale Paris (France)
James R. Gord, Air Force Research Lab. (United States)
Keith D. Grinstead, Air Force Research Lab. and Innovative Scientific Solutions, Inc. (United States)
Campbell D. Carter, Air Force Research Lab. and Innovative Scientific Solutions, Inc. (United States)
Juan Carlos Rolon, Ecole Centrale Paris (France)


Published in SPIE Proceedings Vol. 3783:
Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids
Soyoung Stephen Cha; Peter John Bryanston-Cross; Carolyn R. Mercer, Editor(s)

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