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TECHNICAL PAPERS

The Many Faces of Turbine Surface Roughness

[+] Author and Article Information
Jeffrey P. Bons

Air Force Institute of Technology, Wright-Patterson AFB, OH 45433

Robert P. Taylor, Stephen T. McClain

Mississippi State University, Mississippi State, MS 39762

Richard B. Rivir

Air Force Research Laboratory, Wright-Patterson AFB, OH 45433

J. Turbomach 123(4), 739-748 (Feb 01, 2001) (10 pages) doi:10.1115/1.1400115 History: Received February 01, 2001
Copyright © 2001 by ASME
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References

Figures

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Confocal microscopic image of PS/TE fuel deposits
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PS/MC/Hub chordwise trace: raw data, meanline, and data with meanline removed
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Regional values of Ra (min, avg, and max) from aggregate data
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Regional values of Rt (min, avg, and max) from aggregate data
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(a, b) Traces showing variations in roughness from region to region on PS and SS
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Various transitions from region to region: (a) gradual, (b) abrupt, and (c) spallation related
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(a) Maximum Ra versus service hours for present study; (b) similar data reproduced from Tarada and Suzuki 3, Fig. 2
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Two distinct forms of fuel deposits
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Leading edge deposits/contaminants
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Other forms of contaminants: (a) TBC residue islands and (b) scale from salt and sand
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Examples of surface pitting and erosion
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Spanwise LE waviness pattern due to erosion/deposits (λ=5 mm, raw data with meanline)
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Examples of TBC spallation
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Examples of TBC spallation life-cycle evolution
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Chordwise roughness variation across FC rows
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Spanwise roughness variations downstream of film cooling rows

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