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.
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| 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 | |||||||||
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| 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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