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An experimental and modeling study of nitromethane + O2 + N2 ignition in a shock tube

Nauclér, J. D. LU ; Li, Y. LU ; Nilsson, E. J K LU ; Curran, H. J. and Konnov, A. A. LU (2016) In Fuel 186. p.629-638
Abstract

The ignition of nitromethane/O2/N2 mixtures was investigated via shock tube experiments in the temperature range 947–1333 K at reflected shock pressures near 8, 16 and 32 atm. The ignition was recorded as the intensity maxima of unfiltered luminosity in the range 240–530 nm. Under the experimental conditions of the present study, ignition was found to proceed via a two stage process. Dependencies on concentration, pressure and temperature were examined and discussed. The two ignition stages were separated in time, with individual concentration and temperature dependence. The two experimentally determined ignition stages were found to be pressure independent over the pressure range investigated. The activation... (More)

The ignition of nitromethane/O2/N2 mixtures was investigated via shock tube experiments in the temperature range 947–1333 K at reflected shock pressures near 8, 16 and 32 atm. The ignition was recorded as the intensity maxima of unfiltered luminosity in the range 240–530 nm. Under the experimental conditions of the present study, ignition was found to proceed via a two stage process. Dependencies on concentration, pressure and temperature were examined and discussed. The two ignition stages were separated in time, with individual concentration and temperature dependence. The two experimentally determined ignition stages were found to be pressure independent over the pressure range investigated. The activation energy was derived to be 16.15 ± 1.57 kcal mol−1 for the first stage ignition and 20.89 ± 0.82 kcal mol−1 for the second stage. Modeling using the mechanism by Brequigny et al., published in Proceedings of the Combustion Institute (2014) 703–710, could predict the magnitude of the ignition delay times at 8 atm, but it could not reproduce the temperature dependence of the first stage ignition or the pressure independence of both ignition stages. The measurements are discussed in relation to data from the literature.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Modeling, Multistage ignition, Nitromethane
in
Fuel
volume
186
pages
10 pages
publisher
Elsevier
external identifiers
  • Scopus:84986575902
  • WOS:000385318600064
ISSN
0016-2361
DOI
10.1016/j.fuel.2016.09.003
language
English
LU publication?
yes
id
80252e25-a556-441e-a364-9815ee340ae3
date added to LUP
2016-10-04 10:26:05
date last changed
2017-01-01 08:35:54
@article{80252e25-a556-441e-a364-9815ee340ae3,
  abstract     = {<p>The ignition of nitromethane/O<sub>2</sub>/N<sub>2</sub> mixtures was investigated via shock tube experiments in the temperature range 947–1333 K at reflected shock pressures near 8, 16 and 32 atm. The ignition was recorded as the intensity maxima of unfiltered luminosity in the range 240–530 nm. Under the experimental conditions of the present study, ignition was found to proceed via a two stage process. Dependencies on concentration, pressure and temperature were examined and discussed. The two ignition stages were separated in time, with individual concentration and temperature dependence. The two experimentally determined ignition stages were found to be pressure independent over the pressure range investigated. The activation energy was derived to be 16.15 ± 1.57 kcal mol<sup>−1</sup> for the first stage ignition and 20.89 ± 0.82 kcal mol<sup>−1</sup> for the second stage. Modeling using the mechanism by Brequigny et al., published in Proceedings of the Combustion Institute (2014) 703–710, could predict the magnitude of the ignition delay times at 8 atm, but it could not reproduce the temperature dependence of the first stage ignition or the pressure independence of both ignition stages. The measurements are discussed in relation to data from the literature.</p>},
  author       = {Nauclér, J. D. and Li, Y. and Nilsson, E. J K and Curran, H. J. and Konnov, A. A.},
  issn         = {0016-2361},
  keyword      = {Modeling,Multistage ignition,Nitromethane},
  language     = {eng},
  month        = {12},
  pages        = {629--638},
  publisher    = {Elsevier},
  series       = {Fuel},
  title        = {An experimental and modeling study of nitromethane + O<sub>2</sub> + N<sub>2</sub> ignition in a shock tube},
  url          = {http://dx.doi.org/10.1016/j.fuel.2016.09.003},
  volume       = {186},
  year         = {2016},
}