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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuel

Modeling of Inhomogeneously Premixed Combustion With an Extended TFC Model

[+] Author and Article Information
W. Polifke

Lehrstuhl für Thermodynamik, Technische Universität München, D-85747 Garching, Germanye-mail: polifke@td.mw.tum.de

P. Flohr

Alstom Power Technology, CH-5405 Baden, Switzerlande-mail: peter.flohr@power.alstom.com

M. Brandt

Lehrstuhl für Thermodynamik, Technische Universität München, D-85747 Garching, Germanye-mail: brandt@td.mw.tum.de

J. Eng. Gas Turbines Power 124(1), 58-65 (Feb 01, 2000) (8 pages) doi:10.1115/1.1394964 History: Received November 01, 1999; Revised February 01, 2000
Copyright © 2002 by ASME
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References

Figures

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Influence of strain rate on OH mass fraction in a strained f2b flame
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Critical gradients and extinction strain rates for lean premixed combustion at p=1 bar,Tu=630 K; value of gcr recommended by CFD validation study (○). Extinction strain rate αx of f2b flame (⋄), and b2b flame (× unscaled, + unscaled); Eq. (13) (⋯).
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Temperature distribution of diffusive burning along the stoichiometric line. Two coflowing streams of combustion products (c=1) enter the domain from the left in fuel-rich and fuel-lean conditions, while the adiabatic formulation of the extended TFC model correctly predicts additional heat release along the stoichiometric line (a) no such behavior is captured by the nonadiabatic formulation (b).
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Sketch of the BERL 300 kW combustor
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Axial velocity profiles of the BERL combustor at three downstream positions
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Static temperature profiles of the BERL combustor at three downstream positions
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Sketch of the ABB gas turbine burner
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Axial velocity contours for λ=2.14; (a) TFC model; (b) Magnussen finite rate model
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Temperature contours for λ=2.14; (a) TFC model; (b) Magnussen finite rate model
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Reaction progress for λ=2.5; (a) with pilot fuel injection; (b) without pilot fuel injection

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