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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. http://resolver.caltech.edu/CaltechAUTHORS:20160722-140144210

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Abstract

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
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s00348-016-2191-zDOIArticle
http://link.springer.com/article/10.1007%2Fs00348-016-2191-zPublisherArticle
http://rdcu.be/ts5APublisherFree ReadCube access
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.
Funders:
Funding AgencyGrant Number
Bundesministerium für Wirtschaft und Energie (BMWi)1501425
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Record Number:CaltechAUTHORS:20160722-140144210
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160722-140144210
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
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Jul 2016 21:59
Last Modified:14 Jun 2017 18:29

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