The Effect of Wake Passing on a Flow Separation in a Low-Pressure Turbine Cascade

[+] Author and Article Information
Michael J. Brear

Department of Mechanical and Manufacturing Engineering, University of Melbourne, Australiae-mail: mjbrear@unimelb.edu.au

Howard P. Hodson

Whittle Laboratory Engineering Department, Cambridge University, UKe-mail: hph@eng.cam.ac.uk

J. Fluids Eng 126(2), 250-256 (May 03, 2004) (7 pages) doi:10.1115/1.1667884 History: Received March 04, 2003; Revised October 30, 2003; Online May 03, 2004
Copyright © 2004 by ASME
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Grahic Jump Location
Measured contours of uRMS/V2 at i=0 deg and steady inflow
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Predicted contours of vorticity with instantaneous streamlines superimposed at t=0(f̄=0.89,i=0 deg)
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Predicted instantaneous streamlines superimposed onto contours of entropy coefficient (f̄=0.89,i=0 deg)
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Measured time traces of (uRAW−ū)/V2 along the center of the separated shear layer for a) i=−10 deg, steady inflow and b) i=0 deg, f̄=0.29
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Smoke-wire flow visualization of the separation at 0 deg and −10 deg incidence under steady inflow
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Instantaneous entropy coefficient and instantaneous streamlines from unsteady predictions with steady inflow and i=0 deg (scale as in Fig. 6)
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Isentropic velocity distribution from experiment and timed averaged numerical predictions for steady inflow and i=0 deg (S and R denote separation and reattachment points respectively)
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a) The low-pressure turbine blade and b) the ‘Unsflo’ computational mesh
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Measured contours of ũRMS/V2 during one wake passing period (f̄=0.58,i=0 deg)



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