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TECHNICAL PAPERS

Experimental Study of 3D Unsteady Flow Around Oscillating Blade With Part-Span Separation

[+] Author and Article Information
O. J. R. Queune, L. He

School of Engineering, University of Durham, Durham, DH1 3LE, United Kingdom

J. Turbomach 123(3), 519-525 (Feb 01, 2000) (7 pages) doi:10.1115/1.1370164 History: Received February 01, 2000
Copyright © 2001 by ASME
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References

Figures

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Schematic representation of separated flow inside the last stage of a steam turbine at low flow conditions
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The test facility working section with step upstream of the blade
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Working section in side view with the step used to create flow separation
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(a) Steady flow blade pressure measurements with and without step at 10 and 50 percent span. (b) Steady flow blade pressure measurements with and without step at 70 and 90 percent span.
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Phase angle of first harmonic pressure with NO STEP (Bc: 0.055 C at k: 0.25)
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Amplitude of first harmonic pressure with NO STEP (Bc: 0.055 C at k: 0.25)
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Phase angle of first harmonic pressure WITH STEP (Bc: 0.055 C at k: 0.25)
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Amplitude of first harmonic pressure WITH STEP (Bc: 0.055 C at k: 0.25)
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Aerodynamic damping with step (Bc: 0.055 C at k: 0.25)
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Spanwise distribution in the 2D damping coefficient for two different bending amplitudes (k: 0.5)
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Amplitude of the first harmonic pressure response
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Phase of the first harmonic pressure response
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Relative amplitude of the second harmonic pressure response

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