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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuels

Flashback in a Swirl Burner With Cylindrical Premixing Zone

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

Lehrstuhl für Thermodynamik, Technische Universität München, 85748 Garching, Germany

J. Eng. Gas Turbines Power 126(2), 276-283 (Jun 07, 2004) (8 pages) doi:10.1115/1.1473155 History: Received December 01, 2000; Revised March 01, 2001; Online June 07, 2004
Copyright © 2002 by ASME
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References

Figures

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Premixing section, swirl burner, and combustion chamber
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Optical flame sensor for flashback detection
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Nondimensional mean axial and circumferential velocities ū/ūa and w̄/ūa at z=−0.59Di
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Nondimensional r.m.s. of fluctuating axial and circumferential velocities u/ūa and w/ūa at z=−0.59Di
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Mean axial and circumferential velocity field ū/ūa and w̄/ūa (BC I)
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Optical flame sensor signal during a flashback experiment. Methane-air mixture, ϕ=0.83,T=300°C,Re=54763.
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UV-intensified high speed video sequence. Upstream flame acceleration by forming a flame needle (cf. Fig. 6)
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UV-intensified high speed video sequence. A mushroom-shaped flame tip evolves a separated reaction zone (cf. Fig. 6).
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UV-intensified high speed video sequence. Fast upstream moving wedge shaped flame (cf. Fig. 6).
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Probability for flame position with equivalence ratio ϕ as parameter. Histogram at T=250°C,Re=73031.
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OH concentration distribution during upstream flame propagation-wedge shaped flame. ϕ=0.83,T=300°C,Re=54763.
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OH concentration distribution during upstream flame propagation-mushroom shaped flame. ϕ=0.83,T=300°C,Re=54763.
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OH concentration distribution in stagnating flames. ϕ=0.83,T=300°C,Re=54763.
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Flame position and unsteady flow during a flashback. ϕ=0.83,T=300°C,Re=54763, measuring position r=0.13Di,z=−1.55D.
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Flame position (left) and unsteady flow during a flashback. ϕ=0.83,T=300°C,Re=54763, measuring position r=0,z=−1.55Di.

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