Heat release rate responses to inlet fuel modulations, i.e., the flame transfer function (FTF), are measured for a turbulent, liquid-fueled, swirl-stabilized lean direct fuel injection combustor. Fuel modulations are achieved using a motor-driven rotary fuel valve designed specially for this purpose, which is capable of fuel modulations of 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 amplitudes, 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 temperatures 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.
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e-mail: tzy1@psu.edu
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February 2010
Research Papers
Flame Transfer Functions for Liquid-Fueled Swirl-Stabilized Turbulent Lean Direct Fuel Injection Combustion
Tongxun Yi,
Tongxun Yi
Department of Mechanical and Nuclear Engineering,
e-mail: tzy1@psu.edu
Pennsylvania State University
, University Park, PA 16802
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Domenic A. Santavicca
Domenic A. Santavicca
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802
Search for other works by this author on:
Tongxun Yi
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802e-mail: tzy1@psu.edu
Domenic A. Santavicca
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802J. Eng. Gas Turbines Power. Feb 2010, 132(2): 021506 (6 pages)
Published Online: November 11, 2009
Article history
Received:
March 20, 2009
Revised:
March 22, 2009
Online:
November 11, 2009
Published:
November 11, 2009
Citation
Yi, T., and Santavicca, D. A. (November 11, 2009). "Flame Transfer Functions for Liquid-Fueled Swirl-Stabilized Turbulent Lean Direct Fuel Injection Combustion." ASME. J. Eng. Gas Turbines Power. February 2010; 132(2): 021506. https://doi.org/10.1115/1.3157101
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