Unsteady flame-wall interactions in a reacting jet injected into a vitiated cross-flow

This paper describes measurements and analysis of the unsteady characteristics of a turbulent reacting fuel jet in a vitiated cross-flow. This problem involves coupling between the hydrodynamic stability of the jet–wall system, combustion induced gas expansion and interactions of the autoigniting je...

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Bibliographic Details
Published in:Proceedings of the Combustion Institute 2013, Vol.34 (2), p.3203-3210
Main Authors: Sullivan, Ryan, Wilde, Benjamin, Noble, David R., Periagaram, Karthik, Seitzman, Jerry M., Lieuwen, Tim C.
Format: Article
Language:English
Subjects:
Flame dynamics
Gas turbine combustion
High pressure
Hydrodynamic instability
Reacting jet in cross-flow
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Summary:This paper describes measurements and analysis of the unsteady characteristics of a turbulent reacting fuel jet in a vitiated cross-flow. This problem involves coupling between the hydrodynamic stability of the jet–wall system, combustion induced gas expansion and interactions of the autoigniting jet with the wake flow. Analysis of the unsteady jet motions shows that the reacting jet flaps in a sinuous manner with an amplitude that increases with downstream distance but is relatively independent of jet-to-cross-flow momentum flux ratio, J. This study particularly focuses on unsteady flame–wall interactions in these systems, showing that even though the time averaged flame trajectory may be well removed from wall regions, its instantaneous trajectory may be very near or even attached to the wall. Specifically, for lower J jets (J
ISSN:1540-7489
1873-2704
DOI:10.1016/j.proci.2012.05.009