Investigation of Nonlinear Acoustic Effects in Two-Dimensional Open Cavity Flow


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The aeroacoustic field generated by incompressible airflow over a two-dimensional open cavity is investigated. The main objective of this study is to determine the role of nonlinearity on this phenomenon. To this end the cavity aeroacoustics is investigated with both linearised and nonlinear approaches. Both free-air and confined cavity geometries are investigated and it is shown that nonlinearity does not affect the aeroacoustic field much. The solutions are verified for grid and computational domain independency. It is concluded from this study that nonlinear aeroacoustic phenomena are very weak in external incompressible flows and low-cost linearised formulations can easily be applied in such cases.



Edited by:

Wu Fan






M. Ebrahimi "Investigation of Nonlinear Acoustic Effects in Two-Dimensional Open Cavity Flow", Applied Mechanics and Materials, Vols. 110-116, pp. 4578-4588, 2012

Online since:

October 2011




[1] J. C. Hardin, and S. D. Pope, An acoustic/viscous splitting technique for computational aeroacoustics, Theoretical and Computational Fluid Dynamics, Vol. 6, No. 5-6, 1994, pp.334-340.

DOI: 10.1007/bf00311844

[2] C. K. W. Tam, and J. C. Webb, Dispersion-relation-preserving schemes for computational aeroacoustics, Journal of Computational Physics, Vol. 107, No. 2, 1993, pp.262-281.

DOI: 10.1006/jcph.1993.1142

[3] H. E. Plumblee, J. S. Gibson, and L. W. Lassiter, A theoretical and experimental investigation of the acoustic response of cavities in an aerodynamic flow, WADD-TR-61-75, U.S. Air Force, (1962).

[4] J. E. Rossiter, Wind-tunnel experiments on the flow over rectangular cavities at subsonic and transonic speeds, Aeronautical Research Council Reports and Memoranda 3438, (1964).

[5] M. B. Tracey, and E. B. Plentovich, Characterization of cavity flow fields using pressure data obtained in the Langley 0. 3-Meter Transonic Cryogenic Tunnel, NASA Technical Memorandum 4436, March (1993).

[6] K. K. Ahuja, and J. Mendoza, Effects of cavity dimensions, boundary layer, and temperature on cavity noise with emphasis on benchmark data to validate computational aeroacoustic codes, NASA CR-4653, (1995).

[7] S. M, Grace, An overview of computational aeroacoustic techniques applied to cavity noise prediction, AIAA Paper No. 2001-0510, 39th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, January (2001).

DOI: 10.2514/6.2001-510

[8] M. Farshchi, S. K. Hannani, and M. Ebrahimi, Linearised and non-linear acoustic/viscous splitting techniques for low Mach number flows, International Journal for Numerical Methods in Fluids, Vol. 42, 2003, pp.1059-1072.

DOI: 10.1002/fld.572

[9] J. A. Ekaterinaris, An upwind scheme for the computation of acoustic fields generated by incompressible flow, AIAA Journal, Vol. 35, No. 9, 1997, pp.1448-1455.

DOI: 10.2514/3.13690

[10] P. J. W. Block, Noise response of cavities of varying dimensions at subsonic speeds, NASA TND-8351, April (1976).

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