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Laminar burning velocities of rich near-limiting flames of hydrogen

Zamashchikov, V. V.; Alekseev, Vladimir LU and Konnov, Alexander LU (2014) In International Journal of Hydrogen Energy 39(4). p.1874-1881
Abstract
In the present work, near-limiting hydrogen flames were investigated both experimentally and numerically. Very rich hydrogen + air flames were studied in a constant volume bomb equipped with a pressure sensor and a Schlieren system for optical registration of the flame front movement. The mixtures contained 70% and 75% of hydrogen, the rest being air. The measurements were conducted at pressures from 1 to 4 atm for 70% H-2 + air mixture and from 0.7 to 1.4 atm for 75% H-2 + air mixture. Two methods for determination of the laminar burning velocity were used: from the temporal evolution of the flame front movement and from the pressure records at nearly constant pressure. These methods were compared and discussed in terms of accuracy and... (More)
In the present work, near-limiting hydrogen flames were investigated both experimentally and numerically. Very rich hydrogen + air flames were studied in a constant volume bomb equipped with a pressure sensor and a Schlieren system for optical registration of the flame front movement. The mixtures contained 70% and 75% of hydrogen, the rest being air. The measurements were conducted at pressures from 1 to 4 atm for 70% H-2 + air mixture and from 0.7 to 1.4 atm for 75% H-2 + air mixture. Two methods for determination of the laminar burning velocity were used: from the temporal evolution of the flame front movement and from the pressure records at nearly constant pressure. These methods were compared and discussed in terms of accuracy and implicit assumptions behind them. Markstein lengths were also extracted and compared with the literature by using different extrapolation models. An important role of the critical radius for extraction of the burning velocity and Markstein length is demonstrated. New experimental data are compared with three models for hydrogen combustion to elucidate the need for their further development. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hydrogen, Flame, Burning velocity, Stretch correction
in
International Journal of Hydrogen Energy
volume
39
issue
4
pages
1874 - 1881
publisher
Elsevier
external identifiers
  • wos:000331420900026
  • scopus:84891833113
ISSN
1879-3487
DOI
10.1016/j.ijhydene.2013.11.054
language
English
LU publication?
yes
id
197635c4-94ea-4f22-a59b-ec854f44bcbd (old id 4368460)
date added to LUP
2014-04-16 12:54:18
date last changed
2017-05-21 04:05:35
@article{197635c4-94ea-4f22-a59b-ec854f44bcbd,
  abstract     = {In the present work, near-limiting hydrogen flames were investigated both experimentally and numerically. Very rich hydrogen + air flames were studied in a constant volume bomb equipped with a pressure sensor and a Schlieren system for optical registration of the flame front movement. The mixtures contained 70% and 75% of hydrogen, the rest being air. The measurements were conducted at pressures from 1 to 4 atm for 70% H-2 + air mixture and from 0.7 to 1.4 atm for 75% H-2 + air mixture. Two methods for determination of the laminar burning velocity were used: from the temporal evolution of the flame front movement and from the pressure records at nearly constant pressure. These methods were compared and discussed in terms of accuracy and implicit assumptions behind them. Markstein lengths were also extracted and compared with the literature by using different extrapolation models. An important role of the critical radius for extraction of the burning velocity and Markstein length is demonstrated. New experimental data are compared with three models for hydrogen combustion to elucidate the need for their further development. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.},
  author       = {Zamashchikov, V. V. and Alekseev, Vladimir and Konnov, Alexander},
  issn         = {1879-3487},
  keyword      = {Hydrogen,Flame,Burning velocity,Stretch correction},
  language     = {eng},
  number       = {4},
  pages        = {1874--1881},
  publisher    = {Elsevier},
  series       = {International Journal of Hydrogen Energy},
  title        = {Laminar burning velocities of rich near-limiting flames of hydrogen},
  url          = {http://dx.doi.org/10.1016/j.ijhydene.2013.11.054},
  volume       = {39},
  year         = {2014},
}