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Detailed investigation of ignition by hot gas jets

Sadanandan, R; Markus, D; Schiessl, R; Maas, Ulrik; Olofsson, Jimmy LU ; Seyfried, Hans LU ; Richter, Mattias LU and Aldén, Marcus LU (2007) In Proceedings of the Combustion Institute 31(1). p.719-726
Abstract
Experimental and numerical investigations of the ignition of hydrogen/air mixtures by jets of hot exhaust gases are reported. An experimental realisation of such an ignition process, where a jet of hot exhaust gas impinges through a narrow nozzle into a quiescent hydrogen/air mixture, possibly initiating ignition and combustion, is studied. High-speed laser-induced fluorescence (LIF) image sequences of the hydroxyl radical (OH) and laser Schlieren methods are used to gain information about the spatial and temporal evolution of the ignition process. Recording temporally resolved pressure traces yields information about ambient conditions for the process. Numerical experiments are performed that allow linking these observables to certain... (More)
Experimental and numerical investigations of the ignition of hydrogen/air mixtures by jets of hot exhaust gases are reported. An experimental realisation of such an ignition process, where a jet of hot exhaust gas impinges through a narrow nozzle into a quiescent hydrogen/air mixture, possibly initiating ignition and combustion, is studied. High-speed laser-induced fluorescence (LIF) image sequences of the hydroxyl radical (OH) and laser Schlieren methods are used to gain information about the spatial and temporal evolution of the ignition process. Recording temporally resolved pressure traces yields information about ambient conditions for the process. Numerical experiments are performed that allow linking these observables to certain characteristic states of the gas mixture. The outcome of numerical modelling and experiments indicates the important influence of the hot jet temperature and speed of mixing between the hot and cold gases on the ignition process. The results show the quenching of the flame inside the nozzle and the subsequent ignition of the mixture by the hot exhaust jet. These detailed examinations of the ignition process improve the knowledge concerning flame transmission out of electrical equipment of the type of protection flameproof enclosure. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Jet ignition, OH LIF, High-speed laser diagnostics
in
Proceedings of the Combustion Institute
volume
31
issue
1
pages
719 - 726
external identifiers
  • WOS:000252858000071
  • Scopus:34548708673
DOI
10.1016/j.proci.2006.08.027
language
English
LU publication?
yes
id
c2b07335-5923-4537-861e-37bf36406720 (old id 742331)
date added to LUP
2007-12-13 12:09:17
date last changed
2016-11-20 04:28:50
@misc{c2b07335-5923-4537-861e-37bf36406720,
  abstract     = {Experimental and numerical investigations of the ignition of hydrogen/air mixtures by jets of hot exhaust gases are reported. An experimental realisation of such an ignition process, where a jet of hot exhaust gas impinges through a narrow nozzle into a quiescent hydrogen/air mixture, possibly initiating ignition and combustion, is studied. High-speed laser-induced fluorescence (LIF) image sequences of the hydroxyl radical (OH) and laser Schlieren methods are used to gain information about the spatial and temporal evolution of the ignition process. Recording temporally resolved pressure traces yields information about ambient conditions for the process. Numerical experiments are performed that allow linking these observables to certain characteristic states of the gas mixture. The outcome of numerical modelling and experiments indicates the important influence of the hot jet temperature and speed of mixing between the hot and cold gases on the ignition process. The results show the quenching of the flame inside the nozzle and the subsequent ignition of the mixture by the hot exhaust jet. These detailed examinations of the ignition process improve the knowledge concerning flame transmission out of electrical equipment of the type of protection flameproof enclosure.},
  author       = {Sadanandan, R and Markus, D and Schiessl, R and Maas, Ulrik and Olofsson, Jimmy and Seyfried, Hans and Richter, Mattias and Aldén, Marcus},
  keyword      = {Jet ignition,OH LIF,High-speed laser diagnostics},
  language     = {eng},
  number       = {1},
  pages        = {719--726},
  series       = {Proceedings of the Combustion Institute},
  title        = {Detailed investigation of ignition by hot gas jets},
  url          = {http://dx.doi.org/10.1016/j.proci.2006.08.027},
  volume       = {31},
  year         = {2007},
}