Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Pilot impact on turbulent premixed methane/air and hydrogen-enriched methane/air flames in a laboratory-scale gas turbine model combustor

Pignatelli, F. LU ; Kim, H. LU ; Subash, A. A. LU ; Liu, X. LU ; Szasz, R.Z. LU ; Bai, X.S. LU ; Brackmann, C. LU ; Aldén, M. LU and Lörstad, D. LU (2022) In International Journal of Hydrogen Energy 47(60). p.25404-25417
Abstract
The impact of pilot flame operation on the combustion of pure methane and hydrogen-enriched methane (H2/CH4: 50/50 in vol%) fuels was investigated in a gas turbine model combustor under atmospheric conditions. The burner assembly was designed to mimic the geometry of an industrial burner, the Siemens DLE Burner, in which a concentric annular ring equipped with pilot flame burners is implemented in the dome of the combustor. Two pilot burner configurations have been investigated: a non-premixed and a partially premixed pilot arrangement. The performance of the pilot burners was evaluated for varying Reynolds number (Re) and H2 enrichment. High-speed OH∗ chemiluminescence imaging, as well as simultaneous... (More)
The impact of pilot flame operation on the combustion of pure methane and hydrogen-enriched methane (H2/CH4: 50/50 in vol%) fuels was investigated in a gas turbine model combustor under atmospheric conditions. The burner assembly was designed to mimic the geometry of an industrial burner, the Siemens DLE Burner, in which a concentric annular ring equipped with pilot flame burners is implemented in the dome of the combustor. Two pilot burner configurations have been investigated: a non-premixed and a partially premixed pilot arrangement. The performance of the pilot burners was evaluated for varying Reynolds number (Re) and H2 enrichment. High-speed OH∗ chemiluminescence imaging, as well as simultaneous planar laser-induced fluorescence measurements of the OH radicals and formaldehyde (CH2O) were used for evaluating the dynamics and structures of the flames for different conditions. Furthermore, emission measurements were carried out to determine the influence of hydrogen dilution on the NOx and CO emission levels. The main findings are (a) the effect of the pilot flame is sensitive to the Reynolds number of the main flame and the type of the pilot flame, (b) the stability range becomes narrower with increasing hydrogen ratio, due to the tendency to flashback, (c) non-premixed pilot flames lower the NOx and increase the CO emissions, albeit rather small differences in the emissions have been detected, and (d) the NOx and CO emissions become significantly lower with increasing hydrogen ratio. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Swirl flames, Pilot flame, Hydrogen-enriched flames, Burner stability limits, Emissions
in
International Journal of Hydrogen Energy
volume
47
issue
60
pages
14 pages
publisher
Elsevier
external identifiers
  • scopus:85133789865
ISSN
0360-3199
DOI
10.1016/j.ijhydene.2022.05.282
language
English
LU publication?
yes
id
5ba66553-d48f-40e8-b900-ec24eb672adf
date added to LUP
2022-08-29 16:41:06
date last changed
2023-11-06 21:13:28
@article{5ba66553-d48f-40e8-b900-ec24eb672adf,
  abstract     = {{The impact of pilot flame operation on the combustion of pure methane and hydrogen-enriched methane (H<sub>2</sub>/CH<sub>4</sub>: 50/50 in vol%) fuels was investigated in a gas turbine model combustor under atmospheric conditions. The burner assembly was designed to mimic the geometry of an industrial burner, the Siemens DLE Burner, in which a concentric annular ring equipped with pilot flame burners is implemented in the dome of the combustor. Two pilot burner configurations have been investigated: a non-premixed and a partially premixed pilot arrangement. The performance of the pilot burners was evaluated for varying Reynolds number (Re) and H<sub>2</sub> enrichment. High-speed OH∗ chemiluminescence imaging, as well as simultaneous planar laser-induced fluorescence measurements of the OH radicals and formaldehyde (CH<sub>2</sub>O) were used for evaluating the dynamics and structures of the flames for different conditions. Furthermore, emission measurements were carried out to determine the influence of hydrogen dilution on the NOx and CO emission levels. The main findings are (a) the effect of the pilot flame is sensitive to the Reynolds number of the main flame and the type of the pilot flame, (b) the stability range becomes narrower with increasing hydrogen ratio, due to the tendency to flashback, (c) non-premixed pilot flames lower the NO<sub>x</sub> and increase the CO emissions, albeit rather small differences in the emissions have been detected, and (d) the NO<sub>x</sub> and CO emissions become significantly lower with increasing hydrogen ratio.}},
  author       = {{Pignatelli, F. and Kim, H. and Subash, A. A. and Liu, X. and Szasz, R.Z. and Bai, X.S. and Brackmann, C. and Aldén, M. and Lörstad, D.}},
  issn         = {{0360-3199}},
  keywords     = {{Swirl flames; Pilot flame; Hydrogen-enriched flames; Burner stability limits; Emissions}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{60}},
  pages        = {{25404--25417}},
  publisher    = {{Elsevier}},
  series       = {{International Journal of Hydrogen Energy}},
  title        = {{Pilot impact on turbulent premixed methane/air and hydrogen-enriched methane/air flames in a laboratory-scale gas turbine model combustor}},
  url          = {{http://dx.doi.org/10.1016/j.ijhydene.2022.05.282}},
  doi          = {{10.1016/j.ijhydene.2022.05.282}},
  volume       = {{47}},
  year         = {{2022}},
}