Heat release rate responses to inlet fuel modulations, i.e. the flame transfer function (FTF), are measured for a turbulent, liquid-fueled, swirl-stabilized, LDI combustor. Fuel modulations are achieved using a motor-driven rotary fuel valve designed specially for this purpose, which is capable of fuel modulations up to 1 kHz. Small-amplitude fuel modulations, typically below 2.0% of the mean fuel, are applied in this study. There is almost no change in FTFs at different fuel modulation amplitude, implying that the derived FTFs are linear and that the induced heat release rate oscillations mainly respond to variations in the instantaneous fuel flow rate rather than in the droplet size and distribution. The gain and phases of the FTFs at different air flow rates and preheat temperature are examined. The instantaneous fuel flow rate is determined from pressure measurements upstream of a fuel nozzle. Applications of the FTF to modeling and control of combustion instability and lean blowout are discussed. Near-LBO stability enhancement using small-amplitude fuel modulation based on the output of a LQG controller is numerically demonstrated.
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ASME Turbo Expo 2009: Power for Land, Sea, and Air
June 8–12, 2009
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4882-1
PROCEEDINGS PAPER
Flame Transfer Functions and Their Applications to Combustion Analysis and Control
Tongxun Yi,
Tongxun Yi
The Pennsylvania State University, University Park, PA
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Domenic A. Santavicca
Domenic A. Santavicca
The Pennsylvania State University, University Park, PA
Search for other works by this author on:
Tongxun Yi
The Pennsylvania State University, University Park, PA
Domenic A. Santavicca
The Pennsylvania State University, University Park, PA
Paper No:
GT2009-60181, pp. 757-766; 10 pages
Published Online:
February 16, 2010
Citation
Yi, T, & Santavicca, DA. "Flame Transfer Functions and Their Applications to Combustion Analysis and Control." Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air. Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors. Orlando, Florida, USA. June 8–12, 2009. pp. 757-766. ASME. https://doi.org/10.1115/GT2009-60181
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