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TECHNICAL PAPERS

Effect of Planform Aspect Ratio on Flow Oscillations in Rectangular Cavities

[+] Author and Article Information
Peter J. Disimile

Department of Aerospace Engineering, University of Cincinnati, Cincinnati, OH 45221-0070

Norman Toy, Eric Savory

Fluid Mechanics Research Group, Department of Civil Engineering, University of Surrey, Guildford GU2 5XH, UK

J. Fluids Eng 122(1), 32-38 (Oct 04, 1999) (7 pages) doi:10.1115/1.483223 History: Received December 21, 1998; Revised October 04, 1999
Copyright © 2000 by ASME
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References

Rockwell,  D., and Naudascher,  E., 1979, “Self-Sustained Oscillations of Impinging Free Shear Layer,” Annu. Rev. Fluid Mech., 11, pp. 67–94.
Rossiter, I. E., 1966, “Wind Tunnel Experiments on the Flow Field over Rectangular Cavities at Subsonic and Transonic Speeds,” Aeronautical Research Council, R&M Report No. 3438.
Plumblee, H. E., Gibson, J. S., and Lassiter, L. W., 1962, “A Theoretical and Experimental Investigation of the Acoustic Response of Cavities in Aerodynamic Flow,” Report No. WADD TR-61-75, Wright-Patterson Air Force Base, Dayton, Ohio.
Block, P. J. W., 1976, “Noise Response of Cavities of Varying Dimensions at Subsonic Speeds,” NASA Report No. TN D 8351.
East,  L. F., 1966, “Aerodynamically Induced Resonance in Rectangular Cavities,” J. Sound Vib., 3, pp. 277–287.
Ahuja, K. K., and Medoza, J., 1995, “Effects of Cavity Dimensions, Boundary Layer, and Temperature on Cavity Noise with Emphasis on Benchmark Data to Validate Computational Aeroacoustic Codes,” NASA Contractor Report No. 4653.
Karamcheti, K., 1955, “Acoustic Radiation from Two-Dimensional Rectangular Cutouts in Aerodymanic Surfaces,” NACA Report No. TN 3487.
NASA Tech. Briefs, 1996, “Study of Airflow Tangential to a Screen,” ARC-13213, Ames Research Center.
Tam,  C. K. W., 1976, “The Acoustic Modes of a Two-Dimensional Rectangular Cavity,” J. Sound Vib., 49, pp. 353–364.
Tam,  C. K. W., and Block,  P. J. W., 1978, “On the Tones and Pressure Oscillations Induced by Flow over Rectangular Cavities,” J. Fluid Mech., 89, pp. 373–399.
Komerath, N. M., Ahuja, K. K., and Chambers, F. W., 1987, “Prediction and Measurement of Flows over Cavities — A Survey,” AIAA-87-0166, 25th Aerospace Sciences Meeting, Reno, NV, January 12–15.
Disimile, P. J., DiMicco, R. G., Lueders, K., Savory, E., and Toy, N., 1990, “Unsteady flow in a Three-Dimensional Rectangular Cavity Immersed in a Subsonic Crossflow,” ASME Conference, Forum on Unsteady Flow, Vol. 102, Atlanta, Georgia, pp. 45–50.
Disimile,  P. J., Toy,  N., and Savory,  E., 1998, “Pressure Oscillations in a Subsonic Cavity at Yaw,” AIAA J., 36, pp. 1141–1148.
Tracy, M. B., Plentovich, E. B., and Chu, J., 1992, “Measurements of Fluctuating Pressure in a Rectangular Cavity in Transonic Flow at High Reynolds Numbers,” NASA Report No. TM 4363.
Savory,  E., Toy,  N., Disimile,  P. J., and DiMicco,  R. G., 1993, “The Drag of Three-Dimensional Rectangular Cavities,” J. Appl. Sci. Res., 50, pp. 325–346.
Tam,  C. J., Orkwis,  P. D., and Disimile,  P. J., 1996, “Algebraic Turbulence Model Simulations of Supersonic Open Cavity Flow Physics,” AIAA J., 34, pp. 2255–2260.
Disimile,  P. J., and Orkwis,  P. D., 1997, “Effect of Yaw on the Frequency of Pressure Oscillations within a Rectangular Cavity at Mach 2,” AIAA J., 35, pp. 1233–1235.
Disimile,  P. J., and Orkwis,  P. D., 1998, “Sound Pressure-Level Variations in a Supersonic Rectangular Cavity at Yaw,” J. Propul. Power, 14, pp. 392–398.

Figures

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Diagrammatic arrangement of cavity model cross section
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Plan view of cavity model, turntable and transducer locations. (All dimensions in mm)
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MSR of boundary layer spectrum normalized by sealed cavity microphone spectrum
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Power spectral energy within the boundary layer E(f )B and the cavity E(f )C
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(a) Ratio of the MSR of the cavity spectrum E(f )C to that of the boundary layer spectrum E(f )B for L/W=0.115. (b) Ratio of the MSR of the cavity spectrum E(f )C to that of the boundary layer spectrum E(f )B for L/W=0.682
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MSR of three most dominant peaks (in terms of amplitude) as a function of L/W
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MSR of three most dominant peaks (at constant frequency) as a function of L/W
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Relative sound pressure level as a function of L/W

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