TECHNICAL PAPERS: Gas Turbines: Combustion and Fuel

Passive Control of Combustion Instability in Lean Premixed Combustors

[+] Author and Article Information
Robert C. Steele, Luke H. Cowell

Solar Turbines Inc., San Diego, CA 92186-5376

Steven M. Cannon, Clifford E. Smith

CFD Research Corporation, Huntsville, AL 35805

J. Eng. Gas Turbines Power 122(3), 412-419 (May 15, 2000) (8 pages) doi:10.1115/1.1287166 History: Received March 09, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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Effects of pilot fuel on combustor pressure oscillations and NOx emissions
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Fuel injector modifications to eliminate combustor oscillations
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Basic research injector design
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Cutaway view of FETC test combustor 12
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The stable and unstable regions of τ*F taken from injector tests
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Calculation domain for CFD analysis
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Comparison of predicted velocity distributions in the three-dimensional and calibrated two-dimensional premixer models
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Comparison of heat release using the one-step to equilibrium products and the five-step chemical reaction models
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Predicted mean fluid traces for different fuel injection locations
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Predicted limit cycle pressure history at combustor mid-section [fuel location=5.8 cm (2.29 in)]
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Predicted heat release contours during a complete cycle [fuel location=5.8 cm (2.29 in)]
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Time history of pressure at combustor mid-section for fuel injection locations of (a) 4.3 cm [1.69 in], (b) 4.6 cm [1.81 in], (c) 4.9 cm [1.93 in], (d) 5.8 cm [2.29 in], (e) 6.7 cm [2.65 in], (f) 7.6 cm [3.0 in], (g) 7.9 cm [3.12 in], and (h) 8.5 cm [3.36 in]
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Comparison of measured and predicted instability results as a function of fuel injection location



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