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High-speed OH-PLIF imaging of deflagration-to-detonation transition in H_2–air mixtures

Boeck, Lorenz R. and Mével, Rémy and Fiala, Thomas and Hasslberger, Josef and Sattelmayer, Thomas (2016) High-speed OH-PLIF imaging of deflagration-to-detonation transition in H_2–air mixtures. Experiments in Fluids, 57 (6). Art. No. 105. ISSN 0723-4864. doi:10.1007/s00348-016-2191-z.

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Planar laser-induced fluorescence (PLIF) is considered a standard experimental technique in combustion diagnostics. However, it has only been occasionally applied to explosion experiments with fast combustion regimes. It has been shown that single-shot OH-PLIF with high pulse energies yields clear fluorescence images of fast deflagrations and also detonations. This paper presents the first application of high-speed OH-PLIF at 20 kHz repetition rate to a deflagration-to-detonation transition experiment. Hydrogen–air mixtures at initial atmospheric pressure and ambient temperature are investigated. Satisfactory results are obtained for flame speeds up to about 500 m/s. Flame instabilities and turbulence–flame interactions are observed. Two factors limit the applicability of HS OH-PLIF toward higher flame speeds: excessive flame luminescence masking the HS OH-PLIF signal and strong absorption of laser light by the flame. The variation in OH-PLIF signal-to-background ratio across a DDT process is studied using a 1D laminar premixed flame simulation extended by spectroscopic models.

Item Type:Article
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URLURL TypeDescription ReadCube access
Mével, Rémy0000-0002-0032-350X
Additional Information:© 2016 Springer-Verlag Berlin Heidelberg. Received: 9 September 2015; Revised: 17 May 2016; Accepted: 21 May 2016; Published online: 2 June 2016. The presented work is funded by the German Federal Ministry of Economic Affairs and Energy (BMWi) on the basis of a decision by the German Bundestag (Project No. 1501425) and by the German Research Foundation (DFG) in the framework of Sonderforschungsbereich Transregio 40, which is gratefully acknowledged.
Funding AgencyGrant Number
Bundesministerium für Wirtschaft und Energie (BMWi)1501425
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Issue or Number:6
Record Number:CaltechAUTHORS:20160722-140144210
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Official Citation:Boeck, L.R., Mével, R., Fiala, T. et al. Exp Fluids (2016) 57: 105. doi:10.1007/s00348-016-2191-z
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69170
Deposited By: Tony Diaz
Deposited On:25 Jul 2016 21:59
Last Modified:11 Nov 2021 04:10

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