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 JPEE  Vol.3 No.7 , July 2015
Airfoil Trailing Edge Noise Generation and Its Surface Pressure Fluctuation
Abstract: In the present work, Large Eddy Simulation (LES) of turbulent flows over a NACA 0015 airfoil is performed. The purpose of such numerical study is to relate the aerodynamic surface pressure with the noise generation. The results from LES are validated against detailed surface pressure measurements where the time history pressure data are recorded by the surface pressure microphones. After the flow-field is stabilized, the generated noise from the airfoil Trailing Edge (TE) is predicted using the acoustic analogy solver, where the results from LES are the input. It is found that there is a strong relation between TE noise and the aerodynamic pressure. The results of power spectrum density show that the fluctuation of aerodynamic pressure is responsible for noise generation.
Cite this paper: Zhu, W. and Shen, W. (2015) Airfoil Trailing Edge Noise Generation and Its Surface Pressure Fluctuation. Journal of Power and Energy Engineering, 3, 14-19. doi: 10.4236/jpee.2015.37003.
References

[1]   Brooks, T.F., Pope, D.S. and Marcolini, M.A. (1989) Airfoil Self-Noise and Prediction. NASA Reference Publication 1218, National Aeronautics and Space Administration, USA.

[2]   Zhu, W.J., Heilskov, N., Shen, W.Z. and Sorensen, J.N. (2005) Modeling of Aerodynamically Generated Noise from Wind Turbines. Journal of Solar Energy Engineering, 127, 517-528. http://dx.doi.org/10.1115/1.2035700

[3]   Moriarty, P. (2005) NAFNoise User’s Guide. National Renewable Energy Laboratory.

[4]   Amiet, R.K. (1975) Acoustic Radiation from an Airfoil in a Turbulent Stream. Journal of Sound and Vibration, 407- 420.

[5]   Lowson, M.V. (1993) Assessment and Prediction Model for Wind Turbine Noise: 1. Basic Aerodynamic and Acoustic Models. Flow Soltion Report 93/06, 1-46.

[6]   Parchen, R. (1998) Progress Report DRAW: A Prediction Scheme for Trailing-Edge Noise Based on Detailed Boundary-Layer Characteritics, TNO Rept. HAGRPT 980023, TNO Institute of Applied Physics, The Netherlands.

[7]   Bertagnolio, F., Fischer, A. and Zhu, W.J. (2013) Tuning of Turbulent Boundary Layer Anisotropy for Improved Surface Pressure and Trailing-Edge Noise Modeling. Journal of Sound and Vibration, 333, 991-1010.

[8]   Wolf, A., Lutz, T., Würz, W., Kramer, E., Stalnov, O., Seifert, A., et al. (2014) Trailing Edge Noise Reduction of Wind Turbine Blades by Active Flow Control. Journal of Wind Energy. http://dx.doi.org/10.1002/we.1737

[9]   Howe, M.S. (1978) A Review of the Theory of Trailing Edge Noise. Journal of Sound and Vibration, 61, 437-465. http://dx.doi.org/10.1016/0022-460X(78)90391-7

[10]   Howe, M.S. (1991) Noise Produced by a Sawtooth Trailing Edge. Journal of the Acoustic Society of America, 90, 482- 487. http://dx.doi.org/10.1121/1.401273

[11]   Lighthill, M.J. (1952) On Sound Generated Aerodynamically. I. General Theory. Proceedings of the Royal Society of London A, 211. http://dx.doi.org/10.1098/rspa.1952.0060

[12]   Ffowcs Williams, J.E. and Hawkings, D.L. (1969) Sound Generated by Turbulence and Surfaces in Arbitrary Motion. Philosophical Transactions of the Royal Society, A264, 321-342.

[13]   Hardin, J.C. and Pope, D.S. (1994) An Acoustic/Viscous Splitting Technique for Computational Aero-acoustics. Theoretical and Computational Fluid Dynamics, 6, 321-342. http://dx.doi.org/10.1007/BF00311844

[14]   Shen, W.Z. and Sorensen, J.N. (1999) Comment on the Aeroacoustic Formulation of Hardin and Pope. AIAA Journal, 1, 141-143. http://dx.doi.org/10.2514/2.682

[15]   Zhu, W.J., Shen, W.Z. and Sorensen, J.N. (2011) High-Order Numerical Simulations of Flow Induced Noise. International Journal for Numerical Methods in Fluids, 66, 17-37. http://dx.doi.org/10.1002/fld.2241

[16]   Michelsen, J.A. (1992) Basis 3D—A Platform for Development of Multiblock PDE Solvers. Technical Report, AFM 92-05, Technical University of Denmark, Denmark.

[17]   Sorensen, N.N. (1995) General Purpose Flow Solver Applied to Flow over Hills. Riso-R-827-(EN), Riso National Laboratory, Roskilde, Denmark.

[18]   Ta Phuoc, L. (1994) Modèles de Sous Maille Appliqués aux Ecoulements Instationnaires Décollés. Proceedings of the DRET Conference: Aérodynamique Instationnaire Turbulente-Aspects Numériques et Expérimentaux, Paris, France: DGA/DRET Editors.

[19]   Sagaut, P. (2006) Large Eddy Simulation for Incompressible Flows. 3rd Edition, Springer.

[20]   Farassat, F. (2007) Derivation of Formulations 1 and 1A of Farassat NASA/TM-2007-214853.

[21]   Fischer, A. (2011) Experimental Characterization of Airfoil Boundary Layers for Improvement of Aeroacoustic and Aerodynamic Modeling. Ph.D. Thesis, Technical University of Denmark.

 
 
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