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Investigation of Hydrogen Enriched Natural Gas Flames in a SGT-700/800 Burner Using OH PLIF and Chemiluminescence Imaging

Lantz, Andreas LU ; Collin, Robert LU ; Aldén, Marcus LU ; Lindholm, Annika ; Larfeldt, Jenny and Lörstad, Daniel (2014) ASME Turbo Expo 2014: Turbine Technical Conference and Exposition Volume 4B: Combustion, Fuels and Emissions. p.04-029
Abstract
The effect of hydrogen enrichment to natural gas flames was experimentally investigated at atmospheric pressure conditions using flame chemiluminescence imaging, planar laser-induced fluorescence of hydroxyl radicals (OH PLIF) and dynamic pressure monitoring. The experiments were performed using a 3rd generation dry low emission (DLE) burner used in both SGT-700 and SGT-800 industrial gas turbines from Siemens. The burner was mounted in an atmospheric combustion test rig at Siemens with optical access in the flame region. Four different hydrogen enriched natural gas flames were investigated; 0 vol.%, 30 vol.%, 60 vol.% and 80 vol.% of hydrogen. The results from flame chemiluminescence imaging and OH PLIF show that the size and shape of the... (More)
The effect of hydrogen enrichment to natural gas flames was experimentally investigated at atmospheric pressure conditions using flame chemiluminescence imaging, planar laser-induced fluorescence of hydroxyl radicals (OH PLIF) and dynamic pressure monitoring. The experiments were performed using a 3rd generation dry low emission (DLE) burner used in both SGT-700 and SGT-800 industrial gas turbines from Siemens. The burner was mounted in an atmospheric combustion test rig at Siemens with optical access in the flame region. Four different hydrogen enriched natural gas flames were investigated; 0 vol.%, 30 vol.%, 60 vol.% and 80 vol.% of hydrogen. The results from flame chemiluminescence imaging and OH PLIF show that the size and shape of the flame was clearly affected by hydrogen addition. The flame becomes shorter and narrower when the amount of hydrogen is increased. For the 60 vol.% and 80 vol.% hydrogen flames the flame has moved upstream and the central recirculation zone that anchors the flame has moved upstream the burner exit. Furthermore, the position of the flame front fluctuated more for the full premixed flame with only natural gas as fuel than for the hydrogen enriched flames. Measurements of pressure drop over the burner show an increase with increased hydrogen in the natural gas despite same air flow thus confirming the observation that the flame front moves upstream towards the burner exit and thereby increasing the blockage of the exit. Dynamic pressure measurements in the combustion chamber wall confirms that small amounts of hydrogen in natural gas changes the amplitude of the dynamic pressure fluctuations and initially dampens the axial mode but at higher levels of hydrogen an enhancement of a transversal mode in the combustion chamber at higher frequencies could occur. (Less)
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author
; ; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Chemiluminescence, Natural gas, Flames, Hydrogen, Imaging
host publication
ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT2014-26293
volume
Volume 4B: Combustion, Fuels and Emissions
pages
11 pages
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
conference location
Düsseldorf, Germany
conference dates
2014-06-16 - 2014-06-20
external identifiers
  • wos:000362059000029
  • other:GT2014-26293
  • scopus:84922190617
ISBN
978-0-7918-4569-1
DOI
10.1115/GT2014-26293
language
English
LU publication?
yes
id
23c0b1f3-0b0c-468a-bc9e-4b1f58f555bd (old id 4936193)
date added to LUP
2016-04-04 11:55:46
date last changed
2025-04-04 15:21:03
@inproceedings{23c0b1f3-0b0c-468a-bc9e-4b1f58f555bd,
  abstract     = {{The effect of hydrogen enrichment to natural gas flames was experimentally investigated at atmospheric pressure conditions using flame chemiluminescence imaging, planar laser-induced fluorescence of hydroxyl radicals (OH PLIF) and dynamic pressure monitoring. The experiments were performed using a 3rd generation dry low emission (DLE) burner used in both SGT-700 and SGT-800 industrial gas turbines from Siemens. The burner was mounted in an atmospheric combustion test rig at Siemens with optical access in the flame region. Four different hydrogen enriched natural gas flames were investigated; 0 vol.%, 30 vol.%, 60 vol.% and 80 vol.% of hydrogen. The results from flame chemiluminescence imaging and OH PLIF show that the size and shape of the flame was clearly affected by hydrogen addition. The flame becomes shorter and narrower when the amount of hydrogen is increased. For the 60 vol.% and 80 vol.% hydrogen flames the flame has moved upstream and the central recirculation zone that anchors the flame has moved upstream the burner exit. Furthermore, the position of the flame front fluctuated more for the full premixed flame with only natural gas as fuel than for the hydrogen enriched flames. Measurements of pressure drop over the burner show an increase with increased hydrogen in the natural gas despite same air flow thus confirming the observation that the flame front moves upstream towards the burner exit and thereby increasing the blockage of the exit. Dynamic pressure measurements in the combustion chamber wall confirms that small amounts of hydrogen in natural gas changes the amplitude of the dynamic pressure fluctuations and initially dampens the axial mode but at higher levels of hydrogen an enhancement of a transversal mode in the combustion chamber at higher frequencies could occur.}},
  author       = {{Lantz, Andreas and Collin, Robert and Aldén, Marcus and Lindholm, Annika and Larfeldt, Jenny and Lörstad, Daniel}},
  booktitle    = {{ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT2014-26293}},
  isbn         = {{978-0-7918-4569-1}},
  keywords     = {{Chemiluminescence; Natural gas; Flames; Hydrogen; Imaging}},
  language     = {{eng}},
  pages        = {{04--029}},
  publisher    = {{American Society Of Mechanical Engineers (ASME)}},
  title        = {{Investigation of Hydrogen Enriched Natural Gas Flames in a SGT-700/800 Burner Using OH PLIF and Chemiluminescence Imaging}},
  url          = {{http://dx.doi.org/10.1115/GT2014-26293}},
  doi          = {{10.1115/GT2014-26293}},
  volume       = {{Volume 4B: Combustion, Fuels and Emissions}},
  year         = {{2014}},
}