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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuel

Experimental Investigation of the Interaction of Unsteady Flow With Combustion

[+] Author and Article Information
K.-U. Schildmacher, R. Koch

Institute of Thermal Turbomachinery, University of Karlsruhe, Kaiserstrasse 12, 76128 Karlsruhe, Germany

J. Eng. Gas Turbines Power 127(2), 295-300 (Apr 15, 2005) (6 pages) doi:10.1115/1.1789512 History: Received October 01, 2002; Revised March 01, 2003; Online April 15, 2005
Copyright © 2005 by ASME
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References

Figures

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Experimental setup for the LDA investigations
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Frequency of instability
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Instantaneous fuel concentration for premixed operation (nonreacting flow)
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Pressure amplitude and oscillation frequency for different equivalence ratios
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Normalized axial velocity field and normalized local phase-locked velocity fluctuations at high oscillation sound level (ϕ=0.83)
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Pressure amplitude at the air plenum
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Phase-locked velocity ratio v/u at high pressure fluctuations
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Normalized axial velocity field and normalized local phase-locked velocity fluctuations at low oscillation sound level (ϕ=0.71)
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Phase-locked velocity ratio v/u at low pressure fluctuations
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Normalized axial velocity field and power spectra without oscillations (ϕ=0.66)
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Frequency of instability and Strouhal number
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Power spectra of velocities without oscillations at ϕ=0.5

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