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Transverse jets and jet flames. Part 2. Velocity and OH field imaging

Published online by Cambridge University Press:  25 September 2001

E. F. HASSELBRINK  and
M. G. MUNGAL
E. F. HASSELBRINK
Affiliation:
Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USA Present address: Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2121, USA.
M. G. MUNGAL
Affiliation:
Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USA
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Abstract

Detailed measurements of the velocity field in the symmetry plane of two jets and two jet flames in a crossflow are obtained using particle image velocimetry. The jets issue into a wind tunnel at density-weighted jet-to-crossflow velocity ratios r = 10 and r = 21, with corresponding Reynolds numbers 6000 and 12 800. Ensemble statistics of the velocity field are presented, and some interesting features of the entrainment process in transverse jets are discussed. Deviations from the simple behaviour predicted by the similarity analysis presented in Part 1 are highlighted. Simultaneous planar laser-induced fluorescence imaging of the OH radical is performed in selected regions of the flames. Results suggests that flame/flow interaction is strong near the lifted flamebase, but increasingly weaker further downstream.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 443 , 25 September 2001 , pp. 27 - 68
Copyright
© 2001 Cambridge University Press

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