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TECHNICAL PAPERS

Variations in Upstream Vane Loading With Changes in Back Pressure in a Transonic Compressor

[+] Author and Article Information
Douglas P. Probasco, Tim J. Leger, J. Mitch Wolff

Department of Mechanical & Materials Engineering, Wright State University, Dayton, OH 45435

William W. Copenhaver

Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 44135

Randall M. Chriss

NASA Glenn Research Center, Cleveland, OH 43210

J. Turbomach 122(3), 433-441 (Feb 01, 1998) (9 pages) doi:10.1115/1.1303074 History: Received February 01, 1998
Copyright © 2000 by ASME
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References

Figures

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Schematic of SMI compressor rig
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Flow path through SMI compressor rig
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Transducer locations on IGV: (a) 95, (b) 89, (c) 83, (d) 70, (e) 50 percent IGV chord
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Actual transducer application on IGV
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Coordinate system used in VBI formulation
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Compressor performance map for: (a) open throttle; (b) above design; (c) peak efficiency; (d) below design; (e) near-stall
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Differenced nondimensionalized pressure time traces for various back pressures at 50 percent span and different chordwise positions on IGV: (a) 70, (b) 83, (c) 89, (d) 95 percent
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Differenced nondimensionalized pressure time traces for various back pressures at 75 percent span and different chordwise positions on IGV: (a) 70, (b) 83, (c) 89, (d) 95 percent
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Sketch of various shock positions
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First harmonic unsteady delta pressure phase results: 50 percent span
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First harmonic unsteady delta pressure phase results 75 percent span
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Comparison of first harmonic magnitude for 50 percent span and 75 percent span near-stall
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FFT of near-stall 95 percent chord experimental data
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Pressure time history for convergence check
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105 percent speed: below design Mach number contours; 50 percent span
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Frequency response comparison: 95 percent chord 50 percent span
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Comparison of computational and experimental pressure for below design (a) 50, (b) 70, (c) 83, (d) 89, (e) 95 percent chord location on IGV  

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