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Side Mirror Noise with Adaptive Spectral Reconstruction
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2015 by SAE International in United States
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A new method called Adaptive Spectral Reconstruction (ASR) for the stochastic reconstruction of broadband aeroacoustic sources starting from steady CFD analyses is presented and applied to the evaluation of the noise radiated by a model automotive side mirror.
The new approach exploits some ideas from both SNGR and RPM, and for some aspects can be considered as a sort of mixing between the two methods since it permits to reconstruct both the frequency content of the turbulent field (as done by SNGR) and the spatial cross correlation (as done by RPM).
The turbulent field is reconstructed with a sum of convected plane waves, but two substantial differences are introduced in respect of SNGR. The first difference concerns the spatial variation of the parameters that define each wave, that depends on the wavelength of each wave, rather than being kept constant or related to the CFD correlation length. The second innovative aspect is the usage of a dedicated full hexa adaptive mesh that is refined in function of the expected local correlation length, ensuring that the mesh be enough refined to capture the relevant acoustic length scales.
The method is here applied to the evaluation of a classical side mirror model test case, and results are presented in terms of comparisons with measurements for both in plane and out of plane microphones. Visualizations of reconstructed acoustic sources are also presented.
CitationDi Francescantonio, P., Hirsch, C., Ferrante, P., and Isono, K., "Side Mirror Noise with Adaptive Spectral Reconstruction," SAE Technical Paper 2015-01-2329, 2015, https://doi.org/10.4271/2015-01-2329.
- Tim Colonius, S.L. “Computational aeroacoustics progress on nonlinear problems of sound generation” Progress in Aerospace Sciences, Vol. 40, 2004, pp. 345-416.
- Karweit, M., Belanc-Bennon P., Juve D., and Conte-Billot, G., “Simulation of the propagation of an acoustic wave through a turbulent velocity field: A study of phase variance,” Journal of Acoustical Society of America, Vol. 89, No. 1, 1991, pp. 52-62.
- Bechara, W., Bailly, C., and Candel, P. L. S., “Stochastic Approach to Noise Modeling for Free Turbulent Flows,” AIAA Journal, Vol. 32, No. 3, 1994, pp. 455-464.
- Bailly, C., Lafon, P., and Candel, S., “A Stochastic Approach to Compute Noise Generation and Radiation of Free Turbulent Flows,” AIAA Paper 95-092-1-6, 1995.
- Bailly, C. and Juvé, D., “A Stochastic Approach to Compute Subsonic Noise Using Linearized Euler's Equations,” AIAA Paper 1999-1872, May 1999.
- Bailly, C. and Juve, D., “Numerical Solution of Acoustic Propagation Using Linearized Euler Equations,” AIAA Journal Vol. 38, No. 1, 2000, pp. 22-29.
- Billson, M., Eriksson, L., and Davidson, L., “Jet Noise Modeling Using Synthetic Anisotropic Turbulence,” AIAA Paper 2004-3028, 2004.
- Casalino, D. and Barbarino, M., “A Stochastic Method for Airfoil Self-Noise Computation in Frequency-Domain,” AIAA Paper 2010-3884, June 2010.
- Mesbah, M., “Flow Noise Pediction Using the Stochastic Noise Generation and Radiation Approach,” PhD Thesis, Katholieke Universiteit Leuven.
- Careta, A., Sagues, F., and Sancho, J., “Stochastic Generation of Homogeneous Isotropic Turbulence with Well-Defined Spectra,” Physical Review E, Vol. 48, No. 3, 1993, pp. 2279-2287.
- Ewert, R., “CAA Slat Noise Studies Applying Stochastic Sound Sources Based On Solenoidal Digital Filters,” AIAA Paper 2005-2862, May 2005.
- Ewert, R., “Slat Noise Trend Prediction Using CAA with Stochastic Sound Sources from a Random Particle-Mesh Method (RPM),” AIAA Paper 2006-2667, 2006.
- Ewert, R., “Broadband Slat Noise Prediction Based on CAA and Stochastic Sound Sources from a Random Particle-Mesh (RPM) Method,” Computers & Fluids, Vol. 37, No. 4, 2008, pp. 369-387.
- Kato C., Murata O., Kokubo A., Ichinose K., Kijima T., Horinouchi N, Iida A., “Measurements of Aeroacoustic Noise and pressure Fluctuation generated by a Door-Mirror Model placed on a flat Plate”, Journal of Environment and Engineering, Vol 2, No 2, 2007
- Bauer M., Zeibig A., Koltzsch P. “Application of the SNGR-Model to Compute Trailing Edge noise”, Dresden University of Technology, Research Report 2006
- di Francescantonio P., Ferrante P., Deconick C, Hirsh C. “Assesment of SNGR Method For Robust And Efficient Simulations of Flow Generated Noise” AIAA Paper 2013-2264 19th AIAA/CEAS Aeroacoustics Conference May 27-29, 2013, Berlin, Germany
- Pope S.B., “Turbulent Flows” Cambridge University Press
- Lorteau M., Cléro F., Vuillot F., “Recent progress in LES computation for aeroacoustics of turbulent hot jet. Comparison to experiments and near field analysis”, AIAA 2014-3057 20th AIAA/CEAS Aeroacoustics Conference, 2014
- Wang L., Mockett C., Knacke T., Thiele F., “Detached-Eddy Simulation of Landing-Gear Noise”, AIAA 2013-2069
- Casalino D. et al. “Towards Lattice-Boltzmann Prediction of Turbofan Engine Noise” AIAA 2014-3101
- Ewert R., Appel C., Dierke J., Herr M. “RANS/CAA based prediction of NACA 0012 broadband trailing edge noise and experimental validation”, AIAA 2009-3269,15th AIAA/CEAS Aeroacoustics Conference, 11-13 May 2009, Miami, Florida