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TECHNICAL PAPERS

Nonsynchronous Vibration (NSV) due to a Flow-Induced Aerodynamic Instability in a Composite Fan Stator

[+] Author and Article Information
A. J. Sanders

Honeywell Engines, Systems and Services, Phoenix, AZ 85034e-mail:al.sanders@honeywell.com

J. Turbomach 127(2), 412-421 (May 05, 2005) (10 pages) doi:10.1115/1.1811091 History: Received October 01, 2003; Revised March 01, 2004; Online May 05, 2005
Copyright © 2005 by ASME
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References

Schlichting, H., 1987, Boundary-Layer Theory, Seventh Edition, McGraw-Hill, New York, Chap. 2.
Skop,  R. A., and Griffin,  O. M., 1973, “A Model for the Vortex-Excited Resonant Response of Bluff Cylinders,” J. Sound Vib., 27(2), pp. 225–233.
Blevins,  R. D., and Burton,  T. E., 1976, “Fluid Forces Induced by Vortex Shedding,” ASME J. Fluids Eng., 98(2), pp. 19–26.
Zaman,  K. B. M. Q., McKinzie,  D. J., and Rumsey,  C. L., 1989, “A Natural Low-Frequency Oscillation of the Flow Over an Airfoil Near Stalling Conditions,” J. Fluid Mech., 202, pp. 403–442.
Rumsey, C. L., Thomas, J. L., Warren, G. P., and Liu, G. C., 1986, “Upwind Navier-Stokes Solutions for Separated Periodic Flows,” AIAA Paper No. 86-0247.
Rumsey, C. L., 1987, “A Computational Analysis of Flow Separation Over Five Different Airfoil Geometries at High Angles-of-Attack,” AIAA Paper No. 87-0188.
Camp,  T. R., 1999, “A Study of Acoustic Resonance in a Low-Speed Multistage Compressor,” ASME J. Turbomach., 121(1), pp. 36–43.
Mailach, R., Sauer, H., and Vogeler, K., 2001, “The Periodical Interaction of the Tip Clearance Flow in the Blade Rows of Axial Compressors,” ASME Paper No. 2001-GT-0299.
Lenglin, G., and Tan, C. S., 2002, “Characteristics of Wake- and Tip-Vortex-Induced Unsteady Blade Response in Multistage Compressor Environment,” 7th National Turbine Engine High Cycle Fatigue (HCF) Conference, W. Palm Beach, FL, May 2002.
Kielb, R. E., Thomas, J. P., Barter, J. W., and Hall, K. C., 2003, “Blade Excitation by Aerodynamic Instabilities – A Compressor Blade Study,” ASME Paper No. GT2003-38634.
Shabbir, A., and Zhu, J., 1996, “Assessment of Three Turbulence Models in a Compressor Rotor,” ASME Paper No. 96-GT-198.
A. J.,  Sanders, K. K.,  Hassan, and D. C.,  Rabe, 2004, “An Experimental and Numerical Study of Stall Flutter in a Transonic Low-Aspect Ratio Fan Blisk,” ASME J. Turbomach 126(1), pp. 166–174.
Bakhle, M. A., Srivastava, R., and Keith, Jr., T. G., 1997, “A 3D Euler/Navier-Stokes Aeroelastic Code for Propulsion Applications,” AIAA Paper No. 97-2749.
Bakhle, M. A., Srivastava, R., and Keith Jr., T. G., 1998, “Aeroelastic Calculations Based on Three-Dimensional Euler Analysis,” AIAA Paper No. 98-3295.
Chen, J. P., and Whitfield, D. L., 1993, “Navier-Stokes Calculations for the Unsteady Flowfield of Turbomachinery,” AIAA Paper No. 93-0676.
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Hall, E. J., and Delaney, R. A., 1995, Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems: Task VII—ADPAC Users Manual, NASA CR 195472.
Cumpsty, N. A., 1989, Compressor Aerodynamics, Longman Group, UK, Chap. 9.

Figures

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Fan stage cross section
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Parallel compressor analogy of downstream strut effects on fan stage performance
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Instantaneous suction surface static pressure over one periodic cycle for the choke-side operating point
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Instantaneous suction surface streaklines over one periodic cycle for the choke-side operating point
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Fan stator unsteady pressure envelopes for the choke-side operating point
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Unsteady suction surface static pressure convergence history for the choke-side operating point
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Unsteady mass flow convergence histories for the stall-side, nominal, and choke-side operating points
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Steady mass flow convergence histories for the stall-side, nominal, and choke-side operating points
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Effect of static pressure adder on flow rate
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Fan stator CFD analyses points
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Fan-stator CFD grid and exit profile
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Engine flow visualization test of fan stator just prior to onset of NSV instability
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Windowed fan stator strain gage time histories displaying 180 degrees phasing
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Fan stator strain gage time histories for vanes 43 and 44 during a typical VEN speed sweep
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VEN test fan stator NSV instability boundary
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ARS spectrum for a typical fan stator vane
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Fan stator strain gage time histories for acceleration along nominal operating line
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Fan stator shroud static pressure wave form at 90% corrected speed peak efficiency operating point
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Fan stator vane peak hold frequency spectrum during NSV instability

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