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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuel

Flashback Limits for Combustion Induced Vortex Breakdown in a Swirl Burner

[+] Author and Article Information
M. Kröner, J. Fritz, T. Sattelmayer

Lehrstuhl für Thermodynamik, Technische Universität München, 85747 Garching, Germany

J. Eng. Gas Turbines Power 125(3), 693-700 (Aug 15, 2003) (8 pages) doi:10.1115/1.1582498 History: Received December 01, 2001; Revised March 01, 2002; Online August 15, 2003
Copyright © 2003 by ASME
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References

Figures

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Schematic sketch of a stable flame (a) and a flashback due to combustion induced vortex breakdown (b)
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Dimensionless axial (ū/ūa) and circumferential (w̄/ūa) velocity profiles in the mixing tube
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Correlations, measurements, and computations of the laminar flame speed of H2-air-flames at ambient temperature, p=1 bar
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Laminar flame speeds of CH4-air-flames at various initial temperatures (mixture 1, 1 bar)
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Laminar flame speeds of CH4–H2-mixtures in air (mixture 2, yH2,Fuel=0.05,p=1 bar)
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Laminar flame speeds of CH4–H2-mixtures in air (mixture 3, YH2,Fuel=0.10,p=1 bar)
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Laminar flame speeds of CH4–H2-mixtures in air (mixture 4, YH2,Fuel=0.15,p=1 bar)
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Air excess ratio λ at the flashback limit (mixture 1, YH2,Fuel=0)
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Air excess ratio λ at the flashback limit (mixture 2, YH2,fuel=0.05)
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Air excess ratio λ at the flashback limit (mixture 3, YH2,Fuel=0.10)
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Air excess ratio λ at the flashback limit (mixture 4, YH2,Fuel=0.15)
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Density ratio versus premixing temperature at the flashback limit, different mean velocities (mixture 1)
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Density ratio versus premixing temperature at the flashback limit, different mean velocities (mixture 2)
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Density ratio versus premixing temperature at the flashback limit, different mean velocities (mixture 3)
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Density ratio versus premixing temperature at the flashback limit, different mean velocities (mixture 4)
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Quenching constant Cquench at the flashback limit (mixture 1)
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Correlation of flame quenching at the flashback limits based on Peclet numbers (mixture 1)

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