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Experiments on flame blow-off


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Authors

Kariuki, James 
Cavaliere, Davide Emiglio 
Dawson, James 
Mastorakos, Epaminondas 

Description

The extinction behaviour of flames has been extensively studied from an empirical perspective in the past. Recently, with the advent of fast-response laser diagnostics, the temporal evolution of the blow-off process has been visualised and analyzed. The movies below are taken at 5kHz and monitor the OH* chemiluminescence and OH-PLIF of stable and extinguishing flames of various types (premixed, non-premixed, spray). The work has been published in: (1) Dawson, J. R., Gordon, R. L., Kariuki, J., Mastorakos, E., Masri, A. R. and Juddoo, M. (2011) Visualization of blow-off events in bluff-body stabilized turbulent premixed flames. Proceedings of the Combustion Institute 33, 1559-1566. doi:10.1016/j.proci.2010.05.044. (2) Kariuki, J., Dawson, J. R. & Mastorakos, E. (2012) Measurements in turbulent premixed bluff body flames close to blow-off. Combustion and Flame 159, 2589-2607. doi:10.1016/j.combustflame.2012.01.005. (3) Kariuki, J., Cavaliere, D. E., Letty, C. & Mastorakos, E. (2012) A comparison of the blow-off behaviour of swirl-stabilised premixed and spray flames. Presented at the 50th Aerospace Sciences Meeting, AIAA, Nashville, 4-7 January 2012.. (4) Cavaliere, D.E., Kariuki, J. & Mastorakos, E. (2012) A comparison of the blow-off behaviour of swirl-stablized premixed, non-premixed and spray flames. Submitted to Flow, Turbulence and Combustion.

Keywords

Blow-off, Extinction, Turbulent flame, Spray

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