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TECHNICAL PAPERS

Single-Passage Analysis of Unsteady Flows Around Vibrating Blades of a Transonic Fan Under Inlet Distortion

[+] Author and Article Information
H. D. Li, L. He

School of Engineering, University of Durham, U.K. DH1 3LE Durham

J. Turbomach 124(2), 285-292 (Apr 09, 2002) (8 pages) doi:10.1115/1.1450567 History: Received February 01, 2001; Revised October 15, 2001; Online April 09, 2002
Copyright © 2002 by ASME
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References

Fleeter,  S., Jay,  R. L., and Bennett,  W. A., 1978, “Rotor Wake Generated Unsteady Aerodynamic Response of a Compressor Stator,” ASME J. Eng. Power, 100, pp. 664–675.
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Monsarrat, N. T., 1969, “Design report: Single-Stage Evaluation of Highly-Loaded High-Mach-Number Compressor Stage,” NASA CR 72565.
Bowditch, D. N., and Coltrin, R. E., 1983, “A Survey of Engine Inlet Distortion Capability,” NASA TM-83421.
Hah,  C., Rabe,  D. C., , 1998, “Effects of Inlet Distortion on Flow Field in a Transonic Compressor Rotor,” ASME J. Turbomach., 120, pp. 233–246.
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Marshall, J. G., Xu, L., Denton, J., and Chew, J. W., 2000, “Prediction of Low Engine Order Inlet Distortion Driven Response in a Low Aspect Ratio Fan,” ASME Paper 2000-GT-0374.
Breard, C., Vahdati, M., Sayma, A. I., and Imregun, M., 2000, “An Integrated Time-Domain Aeroelasticity Model for the Prediction of Fan Forced Response Due to Inlet Distortion,” ASME Paper.
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He,  L., 2000, “Three-Dimensional Unsteady Navier-Stokes Analysis of Stator-Rotor Interaction in Axial Flow Turbine,” IMechE, Part A, 214, pp. 13–22.
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He,  L., and Denton,  J. D., 1994, “Three-Dimensional Time-Marching Inviscid and Viscous Solutions for Unsteady Flows Around Vibrating Blades,” ASME J. Turbomach., 116, pp. 469–476.
Jennions,  I. K., and Turner,  M. G., 1993, “Three-Dimensional Navier-Stokes Computations of Transonic Fan Flow Using an Explicit Flow Solver and an Implicit k-e Solver,” ASME J. Turbomach., 115, pp. 261–272.
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Figures

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Mesh (on pitchwise and spanwise section) of NASA rotor 67
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Predicted (upper) and measured (lower) relative Mach number contours
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Pressure jump coefficients (σ=180 deg)—(a) hub section, (b) tip section
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Instantaneous total pressure contours at near inlet section—(a) 11-node mode, (b) 2-node mode, (c) 1-node mode
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Time-space pressure trace on the suction side at 90 percent span section (T: time period; X/C: nondimensional streamwise mesh line distance measured from blade leading edge)—(a) 11-node mode, (b) 2-node mode, (c) 1-node mode
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First harmonic pressure coefficient distribution of torsion mode (clean inflow with different torsion amplitude)
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Pressure jump and unsteady forces history (torsion and inlet distortion, SP: single passage solution, MP-11 passage solution)
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First harmonic pressure coefficient distribution (torsion with different inlet distortion modes)
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First harmonic pressure coefficient distribution (1-node inlet distortion with different torsion amplitude)
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Time-averaged and steady pressure distributions—(a) torsion, (b) torsion and 2-node inlet distortion

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