Abstract
Numerical methods successively became important in the design and optimization of fluid machinery. However, as noise emission is considered, one can hardly find standardized prediction methods combining flow and acoustical optimization. Several numerical field methods for sound calculations have been developed. Due to the complexity of the considered flow, approaches must be chosen to avoid exhaustive computing. In this contribution the noise of a simple propeller is investigated. The configurations of the calculations comply with an existing experimental setup chosen for evaluation. The used in-house CFD solver SPARC contains an acoustic module based on Ffowcs Williams-Hawkings Acoustic Analogy. From the flow results of the time dependent Large Eddy Simulation the time dependent acoustic sources are extracted and given to the acoustic module where relevant sound pressure levels are calculated. The difficulties, which arise while proceeding from open to closed rotors and from gas to liquid are discussed.
Similar content being viewed by others
References
Pantle, I. Strömungsakustik auf der Basis akustischer Analogie mit LES und URANS: [Doctoral Dissertation]. Germany: Universität Karlsruhe, 2002
Gutin, L. On the Sound of a Rotating Propeller. Zhurnal Tekhinicheskoi Fiziki, Translated as NASA TM 1195, 1948, 6: 899–909
Sharland, I J. Source of Noise in Axial Flow Fans. Journal of Sound and Vibration, 1964, 1(3): 302–322
Morfey, C L. The Acoustics of Axial Flow Machines. Journal of Sound and Vibration, 1972, 22(4): 445–466)
Bommes, L, Fricke, J, Klaes, K. Ventilatoren. Essen: Vulkan Verlag, 2003
Carolus, T. Ventilatoren - Aerodynamischer Entwurf, Schallvorhersage, Konstruktion. Wiesbaden, Germany: Teubner Verlag, 2003
Ffowcs Williams, J E, Hawkings, D L. Sound Generation by Turbulence and Surfaces in Arbitrary Motion. Phil. Trans. Roy. Soc. (London), 1969, 264(A): 321–342
Magagnato, F. Large Eddy Simulation for Acoustics - Blunt Bodies (Car, Cylinder). To be Printed at Cambridge University Press, 2005
Magagnato, F, Sorgüven, E, Gabi, M. Far Field Noise Prediction by Large Eddy Simulation and Ffowcs Williams- Hawkings Analogy. In: Proc. of the 9th AIAA/CEAS Aeroacoustics Conference & Exhibit, Hilton Head SC, 2003
Magagnato, F. Kappa - Karlsruhe Parallel Program for Aerodynamics, TASK Quarterly. Scientific Bulletin of Academic Computer Center in Gdansk, 1998, 2(2): 215–270
Goldstein, M E. Aeroacoustics. USA: McGraw-Hill, Inc., 1976
Farassat, F, Myers, M K. Extension of Kirchhoff’s Formula to Radiation from Moving Surfaces. Journal of Sound and Vibration, 1988, 123(3): 451–460
Farassat, F, Brentner, K S. Supersonic Quadrupole Noise Theory for High-speed Helicopter Rotors. Journal of Sound and Vibration, 1998, 218(3): 481–500
Lockard, D P. A Comparison of Ffowcs Williams-Hawkings Solvers for Airframe Noise Applications. In: Proc. of the 8th AIAA/CEAS Aeroacoustics Conference & Exhibit, Breckenridge, Colorado, 2002
Singer, B A, Brentner, K S, Lockard, D P, et al. Simulation of Acoustic Scattering from a Trailing Edge. Journal of Sound and Vibration, 2000, 230(3): 541–560
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Pantle, I., Magagnato, F. & Gabi, M. Numerical noise prediction in fluid machinery. J. of Therm. Sci. 14, 230–236 (2005). https://doi.org/10.1007/s11630-005-0006-2
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11630-005-0006-2