Accurate measurements of laminar burning velocity using the Heat Flux method and thermographic phosphor technique
Li, Bo LU ; Lindén, Johannes LU
; Li, Zhongshan
LU
; Konnov, Alexander
LU
; Aldén, Marcus
LU
and de Goey, L. P. H.
(2011)
In Proceedings of the Combustion Institute
33.
p.939-946
- Abstract
- The Heat Flux method was further developed to significantly reduce its experimental uncertainty and used to determine burning velocities under conditions when the net heat loss from the flame to the burner is zero. Non-stretched flames were stabilized on a perforated plate burner at 1 atm. Measurements of the adiabatic burning velocity of methane air flames at initial mixture temperatures of 318 K are presented. Previously, tiny thermocouples in the thin burner plate were used to evaluate when the heat flux of the flame to the burner is zero. Related errors limit the accuracy of the method so far. A new experimental procedure based on thermographic phosphors is described which avoids these errors. The new experimental procedure is... (More)
- The Heat Flux method was further developed to significantly reduce its experimental uncertainty and used to determine burning velocities under conditions when the net heat loss from the flame to the burner is zero. Non-stretched flames were stabilized on a perforated plate burner at 1 atm. Measurements of the adiabatic burning velocity of methane air flames at initial mixture temperatures of 318 K are presented. Previously, tiny thermocouples in the thin burner plate were used to evaluate when the heat flux of the flame to the burner is zero. Related errors limit the accuracy of the method so far. A new experimental procedure based on thermographic phosphors is described which avoids these errors. The new experimental procedure is described. An UV thermographic phosphor ZnO:Zn was selected and used to sensitively control the temperature uniformity on the burner plate to within 60 mK. Uncertainties of the measurements were analyzed and assessed experimentally. A more accurate evaluation of the gas velocities, using mass weighting, was introduced to increase the accuracy further. The uncertainty of the measured adiabatic burning velocities due to the temperature scattering can be reduced from typically +/-1.5 cm s at Phi = 0.7 methane air flame to +/-0.25 cm s. The overall accuracy of the burning velocities including the uncertainty from the employed mass flow controllers was evaluated to be better than +/-0.35 cm s. Possibilities to further improve the measurement accuracy are discussed with practical considerations. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1870185
- author
- Li, Bo
LU
; Lindén, Johannes
LU
; Li, Zhongshan
LU
; Konnov, Alexander
LU
; Aldén, Marcus
LU
and de Goey, L. P. H.
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Burning velocity, Heat Flux method, Thermographic phosphor
- in
- Proceedings of the Combustion Institute
- volume
- 33
- pages
- 939 - 946
- publisher
- Elsevier
- external identifiers
-
- wos:000285780200099
- scopus:78650862145
- ISSN
- 1540-7489
- DOI
- 10.1016/j.proci.2010.06.111
- language
- English
- LU publication?
- yes
- id
- 52659dd0-2fe5-45fc-b03d-22eaf49331c0 (old id 1870185)
- date added to LUP
- 2016-04-01 11:05:42
- date last changed
- 2022-01-26 05:21:58
@article{52659dd0-2fe5-45fc-b03d-22eaf49331c0,
abstract = {{The Heat Flux method was further developed to significantly reduce its experimental uncertainty and used to determine burning velocities under conditions when the net heat loss from the flame to the burner is zero. Non-stretched flames were stabilized on a perforated plate burner at 1 atm. Measurements of the adiabatic burning velocity of methane air flames at initial mixture temperatures of 318 K are presented. Previously, tiny thermocouples in the thin burner plate were used to evaluate when the heat flux of the flame to the burner is zero. Related errors limit the accuracy of the method so far. A new experimental procedure based on thermographic phosphors is described which avoids these errors. The new experimental procedure is described. An UV thermographic phosphor ZnO:Zn was selected and used to sensitively control the temperature uniformity on the burner plate to within 60 mK. Uncertainties of the measurements were analyzed and assessed experimentally. A more accurate evaluation of the gas velocities, using mass weighting, was introduced to increase the accuracy further. The uncertainty of the measured adiabatic burning velocities due to the temperature scattering can be reduced from typically +/-1.5 cm s at Phi = 0.7 methane air flame to +/-0.25 cm s. The overall accuracy of the burning velocities including the uncertainty from the employed mass flow controllers was evaluated to be better than +/-0.35 cm s. Possibilities to further improve the measurement accuracy are discussed with practical considerations. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.}},
author = {{Li, Bo and Lindén, Johannes and Li, Zhongshan and Konnov, Alexander and Aldén, Marcus and de Goey, L. P. H.}},
issn = {{1540-7489}},
keywords = {{Burning velocity; Heat Flux method; Thermographic phosphor}},
language = {{eng}},
pages = {{939--946}},
publisher = {{Elsevier}},
series = {{Proceedings of the Combustion Institute}},
title = {{Accurate measurements of laminar burning velocity using the Heat Flux method and thermographic phosphor technique}},
url = {{http://dx.doi.org/10.1016/j.proci.2010.06.111}},
doi = {{10.1016/j.proci.2010.06.111}},
volume = {{33}},
year = {{2011}},
}