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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Turbocharger Unstable Operation Diagnosis Using Vibroacoustic Measurements

[+] Author and Article Information
N. Aretakis, K. Mathioudakis, M. Kefalakis, K. Papailiou

Laboratory of Thermal Turbomachines, National Technical University of Athens, Iroon Polytechniou 9, Athens 15773, Greece

J. Eng. Gas Turbines Power 126(4), 840-847 (Nov 24, 2004) (8 pages) doi:10.1115/1.1771686 History: Received October 01, 2002; Revised March 01, 2003; Online November 24, 2004
Copyright © 2004 by ASME
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References

Figures

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Turbocharger test facility schematic
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Close up on the turbocharger under test
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Instruments location for vibroacoustical measurements
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Unsteady flow velocity fluctuation signals for different operating points along compressor characteristic curve
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Acoustic pressure signals for different operating points along compressor characteristic curve
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Acoustic pressure spectra for different operating points along compressor characteristic curve
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Acoustic pressure spectra for different operating points for a constant speed characteristic curve
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Acoustic pressure and Inlet flow velocity rms level along compressor characteristic curve
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Acoustic pressure rms level for different frequency ranges along a compressor characteristic curve
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Inlet flow velocity rms level along compressor characteristic curves
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Acoustic pressure rms level along compressor characteristic curves
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Vertical casing vibration rms level along compressor characteristic curves
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Compressor Φ-Ψ characteristic
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Correlation between acoustic pressure rms level and compressor speed
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Flow chart of a stall and surge diagnostic procedure for a radial compressor
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Correlation between acoustic pressure rms level and compressor speed for turbocharger II

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