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TECHNICAL PAPERS

Experimental Study of the Effect of Periodic Unsteady Wake Flow on Boundary Layer Development, Separation, and Reattachment Along the Surface of a Low Pressure Turbine Blade

[+] Author and Article Information
M. T. Schobeiri, B. Öztürk

Turbomachinery Performance and Flow Research Laboratory, Texas A&M University, College Station, Texas 77843-3123

J. Turbomach 126(4), 663-676 (Dec 29, 2004) (14 pages) doi:10.1115/1.1791646 History: Online December 29, 2004
Copyright © 2004 by ASME
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References

Figures

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Ensemble-averaged velocity contours along the suction surface for different s/s0 with time t/τ as parameter for Ω=3.18 (SR=80 mm), Re=110,000 (time-averaged separation bubble for Ω=3.18 marked red)
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Ensemble-averaged rms fluctuation velocity in the temporal-spatial domain at different y positions for Ω=1.59 (SR=160 mm), and Ω=3.18 (SR=80 mm)
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Time averaged (a) boundary layer thickness, (b) displacement thickness, (c) momentum deficiency thickness and (d) shape factor for three different reduced frequency of Ω=0, 1.59, 3.18 (SR=∞,SR=160 mm, 80 mm), Re=110,000, ss=starting point of separation zone, smd=location of maximum separation bubble height
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Ensemble-averaged relative momentum thickness distribution along the suction surface for different streamwise positions for (a) and (b) at Ω=1.59 (SR=160 mm), (c) and (d) at Ω=3.18 (SR=80 mm)
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Ensemble-averaged relative shape factor distribution along the suction surface for different streamwise positions for (a) and (b) at Ω=1.59 (SR=160 mm), (c) and (d) at Ω=3.18 (SR=80 mm)
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Turbine cascade research facility with the components and the adjustable test section
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Static pressure distributions at Re=110,00 and reduced frequencies Ω=0, 1.59, 3.18 (SR=:,SR=160 mm, 80 mm)
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Time-averaged velocity profiles along the suction surface of the blade at Ω=1.59 (SR=160 mm), Re=110,000 (the numbers represent local s/s0)
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Time-averaged velocity profiles along the suction surface of the blade at Ω=3.18 (SR=80 mm), Re=110,000 (the numbers represent local s/s0)
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Time-averaged turbulent intensity profiles along the suction surface of the blade at Ω=1.59 (SR=160 mm), Re=110,000 (the numbers represent local s/s0)
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Time-averaged turbulent intensity profiles along the suction surface of the blade at Ω=3.18 (SR=80 mm), Re=110,000 (the numbers represent local s/s0)
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Change of separation bubble height under the influence of different reduced frequencies of Ω=0, 1.59, 3.18 (SR=∞,SR=160 mm, 80 mm)
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Ensemble-averaged velocity contours along the suction surface for different s/s0 with time t/τ as parameter for Ω=1.59 (SR=160 mm), Re=110,000 (time-averaged separation bubble for Ω=1.59 marked red)

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