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. doi:10.1016/j.ijhydene.2016.05.206. 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:

URL	URL Type	Description
https://doi.org/10.1016/j.ijhydene.2016.05.206	DOI	Article

ORCID:

Author	ORCID
Melguizo-Gavilanes, J.	0000-0001-5174-6003
Coronel, S.	0000-0002-7088-7976
Mével, R.	0000-0002-0032-350X
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 Agency	Grant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)	UNSPECIFIED
Boeing Company Strategic Research and Development Relationship	CT-BA-GTA-1
NSF	ACI-1053575

Subject Keywords:

Hot particle ignition; Industrial safety; Aircraft safety; Numerical simulation; Hydrogen

Issue or Number:

DOI:

10.1016/j.ijhydene.2016.05.206

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)

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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:

11 Nov 2021 04:05

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