Flame flashback driven by combustion induced vortex breakdown (CIVB) represents one of the most severe reliability problems of modern gas turbines with swirl stabilized combustors. Former experimental investigations of this topic with a 500 kW burner delivered a model for the prediction of the CIVB occurrence for moderate to high mass flow rates. This model is based on a time scale comparison. The characteristic time scales were chosen following the idea that quenching at the flame tip is the dominating effect preventing upstream flame propagation in the center of the vortex flow. Additional numerical investigations showed that the relative position of the flame regarding the recirculation zone influences the interaction of the flame and flow field. The recent analysis on turbulence and chemical reaction of data acquired with high speed measurement techniques applied during the CIVB driven flame propagation by the authors lead to the extension of the prediction model. As the corrugated flame regimes at the flame tip prevails at low to moderate mass flow rates, a more precise prediction in this range of mass flow rates is achieved using a characteristic burnout time for the reactive volume. This paper presents first this new idea, confirms it then with numerical as well as experimental data, and extends finally the former model to a prediction tool that can be applied in the full mass flow range of swirl burners.
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April 2010
Research Papers
Time Scale Model for the Prediction of the Onset of Flame Flashback Driven by Combustion Induced Vortex Breakdown
M. Konle,
M. Konle
Lehrstuhl für Thermodynamik,
e-mail: konle@td.mw.tum.de
TU München
, Boltzmannstrasse 15, Garching D-85748, Germany
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T. Sattelmayer
T. Sattelmayer
Lehrstuhl für Thermodynamik,
TU München
, Boltzmannstrasse 15, Garching D-85748, Germany
Search for other works by this author on:
M. Konle
Lehrstuhl für Thermodynamik,
TU München
, Boltzmannstrasse 15, Garching D-85748, Germanye-mail: konle@td.mw.tum.de
T. Sattelmayer
Lehrstuhl für Thermodynamik,
TU München
, Boltzmannstrasse 15, Garching D-85748, GermanyJ. Eng. Gas Turbines Power. Apr 2010, 132(4): 041503 (6 pages)
Published Online: January 27, 2010
Article history
Received:
April 9, 2009
Revised:
April 14, 2009
Online:
January 27, 2010
Published:
January 27, 2010
Citation
Konle, M., and Sattelmayer, T. (January 27, 2010). "Time Scale Model for the Prediction of the Onset of Flame Flashback Driven by Combustion Induced Vortex Breakdown." ASME. J. Eng. Gas Turbines Power. April 2010; 132(4): 041503. https://doi.org/10.1115/1.4000123
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