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TECHNICAL PAPERS

Active Flow Separation Control of a Stator Vane Using Embedded Injection in a Multistage Compressor Experiment

[+] Author and Article Information
Dennis E. Culley, Michelle M. Bright, Anthony J. Strazisar

NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135

Patricia S. Prahst

AP Solutions, Inc.  

J. Turbomach 126(1), 24-34 (Mar 26, 2004) (11 pages) doi:10.1115/1.1643912 History: Received December 01, 2002; Revised March 01, 2003; Online March 26, 2004
Copyright © 2004 by ASME
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References

Figures

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Flow control vanes. (a) Slot-vane; (b) embedded-fluidic-vane; (c) hole-vane.
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Comparison of unsteady output generated by the three flow control vanes. (a) Slot-vane driven by siren valve; Cμ=0.012 at F+=0.52; (b) embedded-fluidic-vane; Cμ=0.014 at F+=3.36; and (c) hole-vane driven by siren valve; Cμ=0.011 at F+=0.52.
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Injection characteristics of the slot-vane as a function of total momentum
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Injection characteristics of the hole-vane and embedded-fluidic-vane as a function of total momentum for selected test frequencies as a function of total momentum
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Overall performance at design speed of the low speed axial compressor rig
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Wake total pressure profiles for the slot-vane, stagger increased by 3 deg, steady injection, 56% span, ϕ=0.36. Also shown is the wake for the slot-vane at nominal stagger, no injection.
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Loss coefficient as a function of injected momentum for the slot-vane driven by the siren valve actuator, 56% span ϕ=0.36
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Flow delivery system dynamics and the wake response as a function of harmonic oscillation frequency
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Sensitivity of loss reduction to vane restagger angle for the slot-vane, steady injection, 56% span, ϕ=0.36
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Reduction in loss coefficient over the vane span for the slot-vane driven by the siren valve actuator, stagger increased by 3 deg, ϕ=0.36
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Reduction in loss coefficient as a function of flow coefficient for the slot-vane driven by the siren valve actuator, stagger angle increased by 3 deg, at 56% span
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Loss coefficient as a function of injected momentum for the embedded-fluidic-vane and the hole-vane driven by the siren valve actuator, stagger angle increased by 3 deg, 56% span, ϕ=0.36
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Comparison of loss reduction for the slot-vane, embedded-fluidic-vane, and hole-vane at 5 deg restagger angle, steady injection, 56% span, ϕ=0.36
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Time history of the wake response to injection gated with a solenoid valve. Slot-vane, 56% span, ϕ=0.36.
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Vane surface static pressure rise from 70–85% chord with and without steady injection. Slot-vane driven by the siren valve actuator, stagger increased by 3 deg, 56% span.
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Power of the first Fourier harmonic of the downstream rotor blade passing frequency is plotted as a function of flow coefficient without injection and with steady injection at Cμ≈0.010. The inset shows the relative magnitude of the BPF signal at ϕ=0.36 with no injection. Slot-vane driven by the siren valve actuator, stagger increased by 3 deg, 56% span.
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Power spectral density of the casing static pressure with and without closed loop control. Slot-vane driven by the siren valve actuator, stagger angle increased by 3 deg, 56% span.
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Schematic of the flow control actuation system

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