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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

Figures

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

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