Investigation of Fuel and Load Flexibility in a SGT-600/700/800 Burner Under Atmospheric Pressure Conditions Using High-Speed OH-Plif and OH Chemiluminescence Imaging
(2021) In Journal of Engineering for Gas Turbines and Power 143(8).- Abstract
- Fuel and load flexibility have been increasingly important features of industrial gas turbines in order to meet the demand for increased utilization of renewable fuels and to provide a way to balance the grid fluctuations due to the unsteady supply of wind and solar power. Experimental investigations were performed using a standard 3rd generation dry low emission (DLE) burner under atmospheric pressure conditions to study the effect of central and pilot fuel addition, load variations and hydrogen (H2) enrichment in a natural gas (NG) flame. High-speed kHz planar laser-induced fluorescence (PLIF) of OH radicals and imaging of OH chemiluminescence were employed to investigate the flame stabilization, flame turbulence... (More)
- Fuel and load flexibility have been increasingly important features of industrial gas turbines in order to meet the demand for increased utilization of renewable fuels and to provide a way to balance the grid fluctuations due to the unsteady supply of wind and solar power. Experimental investigations were performed using a standard 3rd generation dry low emission (DLE) burner under atmospheric pressure conditions to study the effect of central and pilot fuel addition, load variations and hydrogen (H2) enrichment in a natural gas (NG) flame. High-speed kHz planar laser-induced fluorescence (PLIF) of OH radicals and imaging of OH chemiluminescence were employed to investigate the flame stabilization, flame turbulence interactions,and flame dynamics. Along with the optical measurements, combustion emissions were also recorded to observe the effect of changing operating conditions on NOX level. The burner is used in Siemens industrial gas turbines SGT-600, SGT-700 and SGT-800 with minor hardware differences and the study thus is a step to characterize fuel and load flexibility for these turbines. Without pilot and central fuel injections in the current burner configuration, the main flame is stabilized creating a central recirculation zone (CRZ). Addition of the pilot fuel strengthens the outer recirculation zone (ORZ) and moves the flame anchoring position slightly downstream, whereas the flame moves upstream without affecting the ORZ when central fuel injection is added. The flame was investigated utilizing H2/NG fuel mixtures where the H2 amount was changed from 0 to 100%. The results show that the characteristics of the flames are clearly affected by the addition of H2 and by the load variations. The flame becomes more compact, the anchoring position moves closer to the burner exit and the OH signal distribution becomes more distinct for H2 addition due to increased reaction rate, diffusivity, and laminar burning velocity. Changing the load from part to base, similar trends were observed in the flame behavior but in this case due to the higher heat release because of increased turbulence intensity. (Less)
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https://lup.lub.lu.se/record/dd4dcaae-f195-4717-aaf9-47505597b585
- author
- Subash, Arman Ahamed LU ; Kim, Haisol LU ; Möller, Sven-Inge LU ; Richter, Mattias LU ; Brackmann, Christian LU ; Aldén, Marcus LU ; Lantz, Andreas LU ; Lindholm, Annika ; Larfeldt, Jenny LU and Lörstad, Daniel LU
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Engineering for Gas Turbines and Power
- volume
- 143
- issue
- 8
- article number
- 081009
- publisher
- American Society Of Mechanical Engineers (ASME)
- external identifiers
-
- scopus:85103762616
- ISSN
- 1528-8919
- DOI
- 10.1115/1.4049499
- language
- English
- LU publication?
- yes
- id
- dd4dcaae-f195-4717-aaf9-47505597b585
- date added to LUP
- 2021-01-19 12:51:03
- date last changed
- 2022-04-26 23:45:35
@article{dd4dcaae-f195-4717-aaf9-47505597b585,
abstract = {{Fuel and load flexibility have been increasingly important features of industrial gas turbines in order to meet the demand for increased utilization of renewable fuels and to provide a way to balance the grid fluctuations due to the unsteady supply of wind and solar power. Experimental investigations were performed using a standard 3rd generation dry low emission (DLE) burner under atmospheric pressure conditions to study the effect of central and pilot fuel addition, load variations and hydrogen (H<sub>2</sub>) enrichment in a natural gas (NG) flame. High-speed kHz planar laser-induced fluorescence (PLIF) of OH radicals and imaging of OH chemiluminescence were employed to investigate the flame stabilization, flame turbulence interactions,and flame dynamics. Along with the optical measurements, combustion emissions were also recorded to observe the effect of changing operating conditions on NO<sub>X</sub> level. The burner is used in Siemens industrial gas turbines SGT-600, SGT-700 and SGT-800 with minor hardware differences and the study thus is a step to characterize fuel and load flexibility for these turbines. Without pilot and central fuel injections in the current burner configuration, the main flame is stabilized creating a central recirculation zone (CRZ). Addition of the pilot fuel strengthens the outer recirculation zone (ORZ) and moves the flame anchoring position slightly downstream, whereas the flame moves upstream without affecting the ORZ when central fuel injection is added. The flame was investigated utilizing H<sub>2</sub>/NG fuel mixtures where the H<sub>2 </sub>amount was changed from 0 to 100%. The results show that the characteristics of the flames are clearly affected by the addition of H<sub>2</sub> and by the load variations. The flame becomes more compact, the anchoring position moves closer to the burner exit and the OH signal distribution becomes more distinct for H<sub>2</sub> addition due to increased reaction rate, diffusivity, and laminar burning velocity. Changing the load from part to base, similar trends were observed in the flame behavior but in this case due to the higher heat release because of increased turbulence intensity.}},
author = {{Subash, Arman Ahamed and Kim, Haisol and Möller, Sven-Inge and Richter, Mattias and Brackmann, Christian and Aldén, Marcus and Lantz, Andreas and Lindholm, Annika and Larfeldt, Jenny and Lörstad, Daniel}},
issn = {{1528-8919}},
language = {{eng}},
number = {{8}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
series = {{Journal of Engineering for Gas Turbines and Power}},
title = {{Investigation of Fuel and Load Flexibility in a SGT-600/700/800 Burner Under Atmospheric Pressure Conditions Using High-Speed OH-Plif and OH Chemiluminescence Imaging}},
url = {{http://dx.doi.org/10.1115/1.4049499}},
doi = {{10.1115/1.4049499}},
volume = {{143}},
year = {{2021}},
}