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TECHNICAL PAPERS

Numerical Investigation of Airfoil Clocking in a Three-Stage Low-Pressure Turbine

[+] Author and Article Information
Andrea Arnone, Michele Marconcini, Roberto Pacciani

“Sergio Stecco” Department of Energy Engineering, University of Florence, 50139 Firenze, Italy

Claudia Schipani, Ennio Spano

Fiat Avio S.p.A.—Direzione Tecnica, 10127 Torino, Italy

J. Turbomach 124(1), 61-68 (Feb 01, 2001) (8 pages) doi:10.1115/1.1425810 History: Received February 01, 2001
Copyright © 2002 by ASME
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References

Figures

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LP turbine meridional section
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H-type grid for the midspan section
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Evolution of the nondimensional lift coefficient amplitude harmonics
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Instantaneous entropy contours
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Turbine geometry and clocking positions of 4th and 5th-stage blade rows
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Efficiency variations due to clocking stage 4
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Efficiency variations due to clocking stage 5
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Instantaneous entropy contours during one period (ηmax), and time-averaged total pressure pitchwise distribution in front of the 4th stator
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Instantaneous entropy contours during one period (ηmin), and time-averaged total pressure pitchwise distribution in front of the 4th stator
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Efficiency variation obtained with a quasi-three-dimensional and with a fully three-dimensional unsteady viscous analysis
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Unsteady pressure coefficient distributions and time-averaged load
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Turbine efficiency variations after 5th-stage clocking
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Distance-time diagrams of intermittency (left) and nondimensional wall shear stress (right) for the 4th stator

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