In most dry low NOx combustor designs of stationary gas turbines the front panel impingement cooling air is directly injected into the combustor primary zone. This air partially mixes with the swirling flow of premixed reactants from the burner and reduces the effective equivalence ratio in the flame. However, local unmixedness and the lean equivalence ratio are supposed to have a major impact on combustion performance. Overall goal of this investigation is to answer the question whether the cooling air injection into the primary combustor zone has a beneficial effect on combustion stability and NOx emissions or not. The flame stabilization of a typical swirl burner with and without front panel cooling air injection is studied in detail under atmospheric conditions close to the lean blowout limit (LBO) in a full scale single burner combustion test rig. Based on previous isothermal investigations a typical injection configuration is implemented for the combustion tests. Isothermal results of experimental studies in a water test rig adopting high speed planar laser-induced fluorescence (HSPLIF) reveal the spatial and temporal mixing characteristics for the experimental setup studied under atmospheric combustion. This paper focuses on the effects of cooling air injection on both flame dynamics and emissions in the reacting case. To reveal dependencies of cooling air injection on combustion stability and NOx emissions, the amount of injected cooling air is varied. OH*-chemiluminescence measurements are applied to characterize the impact of cooling air injection on the flame front. Emissions are collected for different cooling air concentrations, both global measurements at the chamber exit and local measurements in the region of the flame front close to the burner exit. The effect of cooling air injection on pulsation level is investigated by evaluating the dynamic pressure in the combustor. The flame stabilization at the burner exit changes with an increasing degree of dilution with cooling air. Depending on the amount of cooling only a specific share of the additional air participates in the combustion process.
Skip Nav Destination
ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
June 3–7, 2013
San Antonio, Texas, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5510-2
PROCEEDINGS PAPER
Impact of Cooling Air Injection on the Combustion Stability of a Premixed Swirl Burner Near Lean Blowout
A. Marosky,
A. Marosky
Technische Universität München, Garching, Germany
Search for other works by this author on:
V. Seidel,
V. Seidel
Technische Universität München, Garching, Germany
Search for other works by this author on:
T. Sattelmayer,
T. Sattelmayer
Technische Universität München, Garching, Germany
Search for other works by this author on:
W. Geng
W. Geng
Alstom Power, Baden, Switzerland
Search for other works by this author on:
A. Marosky
Technische Universität München, Garching, Germany
V. Seidel
Technische Universität München, Garching, Germany
T. Sattelmayer
Technische Universität München, Garching, Germany
F. Magni
Alstom Power, Baden, Switzerland
W. Geng
Alstom Power, Baden, Switzerland
Paper No:
GT2013-94859, V01AT04A066; 12 pages
Published Online:
November 14, 2013
Citation
Marosky, A, Seidel, V, Sattelmayer, T, Magni, F, & Geng, W. "Impact of Cooling Air Injection on the Combustion Stability of a Premixed Swirl Burner Near Lean Blowout." Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. Volume 1A: Combustion, Fuels and Emissions. San Antonio, Texas, USA. June 3–7, 2013. V01AT04A066. ASME. https://doi.org/10.1115/GT2013-94859
Download citation file:
12
Views
Related Proceedings Papers
Related Articles
Catalytic Influence of Water Vapor on Lean Blow-Off and NO x Reduction for Pressurized Swirling Syngas Flames
J. Eng. Gas Turbines Power (June,2018)
FLOX ® Combustion at High Pressure With Different Fuel Compositions
J. Eng. Gas Turbines Power (January,2008)
Advancements in Sustainable Aviation Fuels: Impact of Nano-Additives and Ammonia-Based Strategies on Emissions
J. Eng. Gas Turbines Power (November,2024)
Related Chapters
Introduction
Consensus on Operating Practices for Control of Water and Steam Chemistry in Combined Cycle and Cogeneration
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Combined Cycle Power Plant
Energy and Power Generation Handbook: Established and Emerging Technologies