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TECHNICAL PAPERS: Gas Turbines: Controls, Diagnostics, and Instrumentation

Diagnosis for Loose Blades in Gas Turbines Using Wavelet Analysis

[+] Author and Article Information
Meng Hee Lim, M. Salman Leong

Institute of Noise and Vibration, University of Technology, 54100 Kuala Lumpur, Malaysia

J. Eng. Gas Turbines Power 127(2), 314-322 (Apr 15, 2005) (9 pages) doi:10.1115/1.1772406 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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Wavelet analysis (a) good condition (b) with fault
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Waterfall plots: (a) baseline, (b) condition no. 1 (1 mm), (c) condition no. 1 (2 mm), (d) condition no. 2 (three blades, 2 mm), (e) condition no. 3 (six blades, 2 mm)
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Coast down wavelet maps: (a) baseline, (b) condition no. 1 (1 mm), (c) condition no. 1 (2 mm), (d) condition no. 2 (three blades, 2 mm), (e) condition no. 3 (six blades, 2 mm)
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Zoomed BPF time waveform
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Basic configuration of compressor rotor and its pertinent components (Ng and Zahir 6)
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Typical crack location on intermediate pieces (Ng and Zahir 6)
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View of the experimental test rig
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Photograph showing blade assembly with intermediate locking pieces
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Coiflet (level 5) wavelet
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Comparison of baseline and faulty condition 1
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Comparison of faulty condition 2
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Typical global wavelet map
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Local wavelet maps: (a) baseline, (b) condition no. 1 (one blade, 1 mm), (c) condition no. 2 (three blades, 1 mm)

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