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Experimental study of minimum ignition energy of lean H_2-N_(2)O mixtures

Coronel, S. and Mével, R. and Bane, S. P. M. and Shepherd, J. E. (2013) Experimental study of minimum ignition energy of lean H_2-N_(2)O mixtures. Proceedings of the Combustion Institute, 34 (1). pp. 895-902. ISSN 1540-7489. http://resolver.caltech.edu/CaltechAUTHORS:20130205-103751364

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Abstract

Ignition energies for short duration (<50 ns) spark discharges were measured for undiluted and nitrogen-diluted H_2-N_(2)O mixtures of equivalence ratios ϕ = 0.15 and 0.2, dilution of 0% and 20% N_2, and initial pressures of 15–25 kPa. The ignition events were analyzed using statistical tools and the probability of ignition versus spark energy density (spark energy divided by the spark length) was obtained. The simple cylindrical ignition kernel model was compared against the results from the present study. Initial pressure has a significant effect on the width of the probability distribution, ranging from a broad (P = 15 kPa) to a narrow (P = 25 kPa) probability distribution indicating that the statistical variation of median spark energy density increases as initial pressure of the mixture decreases. A change in the equivalence ratio from 0.15 to 0.2 had a small effect on the median spark energy density. The addition of 20% N_2 dilution caused a significant increase in the median spark energy density when compared to no dilution. The extrapolation of the present results to atmospheric pressure, stoichiometric H_2-N_(2)O indicates that the electrostatic discharge ignition hazards are comparable to or greater than H_2-N_(2)O mixtures.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.proci.2012.05.062DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S1540748912000636PublisherUNSPECIFIED
ORCID:
AuthorORCID
Shepherd, J. E.0000-0003-3181-9310
Additional Information:© 2012 The Combustion Institute. Published by Elsevier Inc. Available online 18 June 2012.
Group:GALCIT
Subject Keywords:Spark ignition; Minimum ignition energy; Hydrogen; Nitrous oxide; Nuclear waste safety
Record Number:CaltechAUTHORS:20130205-103751364
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130205-103751364
Official Citation:S. Coronel, R. Mével, S.P.M. Bane, J.E. Shepherd, Experimental study of minimum ignition energy of lean H2-N2O mixtures, Proceedings of the Combustion Institute, Volume 34, Issue 1, 2013, Pages 895-902, ISSN 1540-7489, 10.1016/j.proci.2012.05.062.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36774
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:05 Feb 2013 22:18
Last Modified:22 Sep 2016 22:31

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