Mével, R. and Pichon, S. and Catoire, L. and Chaumeix, N. and Paillard, C. -E. and Shepherd, J. E. (2013) Dynamics of excited hydroxyl radicals in hydrogen-based mixtures behind reflected shock waves. Proceedings of the Combustion Institute, 34 (1). pp. 677-684. ISSN 1540-7489. doi:10.1016/j.proci.2012.06.151. https://resolver.caltech.edu/CaltechAUTHORS:20130131-095240660
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Abstract
The chemiluminescence originating from OH∗, the excited hydroxyl radical, is one of the most extensively used diagnostics to characterize auto-ignition delay time of gaseous mixtures behind reflected shock waves. We have carried out new experiments and modeling of this diagnostic as well as analyzed previous results for hydrogen-based mixtures, including H_2–O_2, H_2O_2–H_(2)O, H_2–N_(2)O and H_2–O_2–N_(2)O. The experiments were analyzed with a detailed chemical reaction model which included mechanisms for OH∗ creation, quenching and emission. Simulations of the reaction behind reflected shock waves were used to predict OH∗ emission profiles and compare this with measured results as well as profiles of temperature and the ground state concentrations of OH. Analysis of OH∗ rates of progress demonstrates that a quasi-steady state approximation is applicable and an algebraic model for OH∗ concentrations can be derived that relates emission to the product of concentrations of O and H for H_2–O_2 and H_(2)O_2 mixtures and an additional contribution by the product of H and N_(2)O when N_(2)O is an oxidizer.
| Item Type: | Article | |||||||||
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| Additional Information: | © 2012 The Combustion Institute. Published by Elsevier Inc. Available online 21 July 2012. The authors acknowledge Aurélien Demenay, Université d’Orléans, and Jason Damazo, Caltech, for their help in setting-up the shock-tube at the Explosion Dynamics Laboratory at Caltech. | |||||||||
| Group: | GALCIT | |||||||||
| Subject Keywords: | Excited hydroxyl radical; Reflected shock wave; Hydrogen; High temperature chemical kinetics | |||||||||
| Issue or Number: | 1 | |||||||||
| DOI: | 10.1016/j.proci.2012.06.151 | |||||||||
| Record Number: | CaltechAUTHORS:20130131-095240660 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130131-095240660 | |||||||||
| Official Citation: | R. Mével, S. Pichon, L. Catoire, N. Chaumeix, C.-E. Paillard, J.E. Shepherd, Dynamics of excited hydroxyl radicals in hydrogen-based mixtures behind reflected shock waves, Proceedings of the Combustion Institute, Volume 34, Issue 1, 2013, Pages 677-684, ISSN 1540-7489, 10.1016/j.proci.2012.06.151. | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 36707 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | INVALID USER | |||||||||
| Deposited On: | 31 Jan 2013 21:39 | |||||||||
| Last Modified: | 09 Nov 2021 23:24 |
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