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TECHNICAL PAPERS

The Transition Mechanism of Highly Loaded Low-Pressure Turbine Blades

[+] Author and Article Information
R. D. Stieger, H. P. Hodson

Whittle Laboratory, Cambridge University, Engineering Department, Madingley Road, Cambridge CB3 0DY, UK

J. Turbomach 126(4), 536-543 (Dec 29, 2004) (8 pages) doi:10.1115/1.1773850 History: Received December 01, 2002; Revised March 01, 2003; Online December 29, 2004
Copyright © 2004 by ASME
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References

Figures

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Bar passing cascade with T106 profile
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Isentropic surface velocity distribution measured on the T106 LP turbine cascade
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Space-time diagram of boundary layer edge velocity nondimensionalised by V2is
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Space-time diagram of measured H12
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Space-time diagram of measured boundary layer TKE thickness
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Boundary layer structure prior to the wake arrival. Vector plots of (a) ensemble average velocity and (b) perturbation velocity. Contour plots of nondimensional (c) vorticity, (d) turbulent kinetic energy, and (e) production of TKE. Re=1.6×105,sb/sc=1.
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Boundary layer structure during the interaction of wake and separated shear layer. Re=1.6×105,sb/sc=1.
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Boundary layer structure through the wake-induced turbulent strip. Re=1.6×105,sb/sc=1.
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Boundary layer structure in the calmed region. Re=1.6×105,sb/sc=1.
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Sketch of rollup mechanism
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Schematic of the transition mechanism resulting from the interaction of a wake and separating boundary layer

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