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Dynamics of ignition of stoichiometric hydrogen-air mixtures by moving heated particles

Melguizo-Gavilanes, J. and Coronel, S. and Mével, R. and Shepherd, J. E. (2017) Dynamics of ignition of stoichiometric hydrogen-air mixtures by moving heated particles. International Journal of Hydrogen Energy, 42 (11). pp. 7380-7392. ISSN 0360-3199. https://resolver.caltech.edu/CaltechAUTHORS:20160705-132837102

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Abstract

Studying thermal ignition mechanisms is a key step for evaluating many ignition hazards. In the present work, two-dimensional simulations with detailed chemistry are used to study the reaction pathways of the transient flow and ignition of a stoichiometric hydrogen/air mixture by moving hot spheres. For temperatures above the ignition threshold, ignition takes place after a short time between the front stagnation point and separation location depending upon the sphere's surface temperature. Closer to the threshold, the volume of gas adjacent to the separation region ignites homogeneously after a longer time. These results demonstrate the importance of boundary layer development and flow separation in the ignition process.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.ijhydene.2016.05.206DOIArticle
http://www.sciencedirect.com/science/article/pii/S0360319916312058PublisherArticle
ORCID:
AuthorORCID
Shepherd, J. E.0000-0003-3181-9310
Additional Information:© 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. Received 2 April 2016, Revised 20 May 2016, Accepted 23 May 2016, Available online 28 June 2016. This work was carried out in the Explosion Dynamics Laboratory of the California Institute of Technology. J. Melguizo-Gavilanes was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) Postdoctoral Fellowship Program. R. Mével, S. Coronel and J.E. Shepherd by The Boeing Company through a Strategic Research and Development Relationship Agreement CT-BA-GTA-1. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant number ACI-1053575.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Boeing Company Strategic Research and Development Relationship CT-BA-GTA-1
NSFACI-1053575
Subject Keywords:Hot particle ignition; Industrial safety; Aircraft safety; Numerical simulation; Hydrogen
Issue or Number:11
Record Number:CaltechAUTHORS:20160705-132837102
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160705-132837102
Official Citation:J. Melguizo-Gavilanes, S. Coronel, R. Mével, J.E. Shepherd, Dynamics of ignition of stoichiometric hydrogen-air mixtures by moving heated particles, International Journal of Hydrogen Energy, Volume 42, Issue 11, 16 March 2017, Pages 7380-7392, ISSN 0360-3199, https://doi.org/10.1016/j.ijhydene.2016.05.206. (http://www.sciencedirect.com/science/article/pii/S0360319916312058)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68831
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:05 Jul 2016 20:47
Last Modified:03 Oct 2019 10:16

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