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TECHNICAL PAPERS: Gas Turbines: Controls and Diagnostics

Active Control of Discrete-Frequency Turbomachinery Noise Using a Rotary-Valve Actuator

[+] Author and Article Information
Scott D. Sawyer

Department of Mechanical Engineering, University of Akron, Akron, OH 44323

Sanford Fleeter

Department of Mechanical Engineering, Purdue University, West Lafayette, IN 47907

J. Eng. Gas Turbines Power 122(2), 226-232 (Jan 03, 2000) (7 pages) doi:10.1115/1.483199 History: Received March 09, 1999; Revised January 03, 2000
Copyright © 2000 by ASME
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References

Gliebe, P. R., 1992, “Aeroacoustics in Turbomachines and Propellers—Future Research Needs,” 6th International Symposium on Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines and Propellers, H. F. Atassi, editor Springer-Verlag, New York and Berlin.
Groeneweg,  J. F., and Rice,  E. J., 1987, “Aircraft Turbofan Noise,” ASME J. Turbomach., 109, No. 1, pp. 130–141.
Smith, J. P., Burdisso, R. A., and Fuller, C. R., 1996, “Experiments on the Active Control of Inlet Noise From a Turbofan Jet Engine Using Multiple Circumferential Control Arrays,” AIAA Paper 96-1792.
Kousen,  K. A., and Verdon,  J. M., 1994, “Active Control of Wake/Blade Row Interaction Noise,” AIAA J., 32, No. 10, pp. 1953–1960.
Kousen, K. A., 1993, “Multiple Mode Minimization of Wake/Blade-Row Interaction Noise Using a Single Actuator Per Blade,” AIAA Paper 96-1691.
Sawyer, S., and Fleeter, S., 1997, “Active Control of Discrete-Frequency Noise Generated by Rotor-Stator Interactions,” AIAA Paper 97-1689.
Tyler,  J. M., and Sofrin,  T. G., 1962, “Axial Flow Compressor Noise Studies,” SAE Trans., 70, pp. 309–332.
Sawyer, S., and Fleeter, S., 1994, “Mean Stator Loading Effect On The Acoustic Response Of A Rotating Cascade,” AIAA Paper 94-2953.
Sawyer, S., Feiereisen, J. M., and Fleeter, S., 1996, “The Influence of Rotor Detuning on the Acoustic Response of an Annular Cascade,” AIAA Paper 96-1689.

Figures

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Pressure pulse generator rotary-valve assembly schematic
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Rotating disk and active airfoil ports
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Rotary-valve outlet port open area at an instant in time
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Active control authority spatial mode magnitude as a function of rotary-valve flow rate
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Two vane rotary-valve discrete-frequency noise generation
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Spatial mode magnitude as a function of rotary-valve air supply
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Influence of valve phase angle on spatial mode magnitude
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Influence of valve phase angle on spatial mode magnitude
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Upstream control using rotary-valve active noise control system
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Turbomachine noise sources
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Purdue annular cascade facility
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Vane to vane phase shift of acoustic pressure and active control voltage
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Active control of kg=−2 mode in the downstream duct

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