This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Aeroacoustic Tonal Noise Generation Analysis on a Simplified Side-View Mirror Using a High Order Discontinuous Galerkin Spectral Element Method
Technical Paper
2016-01-1803
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Avoiding narrowband components in the acoustic spectrum is one of the most critical objectives in the automotive aeroacoustic optimization process. The underlying physical mechanisms are not completely understood. In a preceding numerical and experimental investigation, we performed large eddy simulations of an early-development stage realistic side-view mirror, where tonal noise was captured and the principle mechanisms were identified. In this contribution, we present simulations on a simplified two-dimensional geometry that is based on these findings. It is shown that the basic flow topology relevant for tonal noise generation on the original side-view mirror as well as the tonal noise source is reproduced in the 2D case. Furthermore, we present comparisons with measurements and the necessity and influence of a splitter plate downstream of the 2D body to avoid large scale vortex shedding. The present results are the basis for ongoing, detailed numerical analyses of the fundamental source mechanism.
Citation
Frank, H. and Munz, C., "Aeroacoustic Tonal Noise Generation Analysis on a Simplified Side-View Mirror Using a High Order Discontinuous Galerkin Spectral Element Method," SAE Technical Paper 2016-01-1803, 2016, https://doi.org/10.4271/2016-01-1803.Also In
References
- Frank H. and Munz C.-D. Direct aeroacoustic simulation of acoustic feedback phenomena on a side-view mirror submitted to Journal of Sound and Vibration 2016
- Werner M. , Würz W. , and Kr¨amer E. Experimental investigations of tonal noise on a vehicle side mirror Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Munich, Germany Springer 2014
- Paterson R. W. , Vogt P. G. , Fink M. R. , and Munch C. L. Vortex noise of isolated airfoils Journal of Aircraft 10 5 296 302 1973
- Tam C. Discrete tones of isolated airfoils Journal of the Acoustical Society of America 55 1173 1177 1974
- Arbey H. and Bataille J. Noise generated by airfoil profiles placed in a uniform laminar flow Journal of Fluid Mechanics 134 33 47 1983
- Jones L. E. and Sandberg R. D. Numerical analysis of tonal airfoil self-noise and acoustic feedback-loops Journal of Sound and Vibration 330 25 6137 6152 2011
- Plogmann B. , Herrig A. , and Würz W. Experimental investigations of a trailing edge noise feedback mechanism on a naca 0012 airfoil Experiments in fluids 54 5 1 14 2013
- Werner M. , Würz W. , and Kr¨amer E. Experimental investigations of an aeroacoustic feedback mechanism on a two-dimensional side mirror model in preparation 2016
- Kopriva D. A. Implementing spectral methods for partial differential equations: Algorithms for scientists and engineers Springer Science & Business Media 2009
- Gassner G. J. and Beck A. D. On the accuracy of high-order discretizations for underresolved turbulence simulations Theoretical and Computational Fluid Dynamics 27 3-4 221 237 2013
- Beck A. D. , Bolemann T. , Flad D. , Frank H. , Gassner G. J. , Hindenlang F. , and Munz C.-D. High-order discontinuous Galerkin spectral element methods for transitional and turbulent flow simulations International Journal for Numerical Methods in Fluids 76 8 522 548 2014
- Dovgal A. , Kozlov V. , and Michalke A. Laminar boundary layer separation: Instability and associated phenomena Progress in Aerospace Sciences 30 1 61 94 1994
- Roshko A. and Lau J. C. Some observations on transition and reattachment of a free shear layer in incompressible flow Proc. 1965 Heat Transfer and Fluid Mechanics Institute edited by Charwat AF Stanford University Press, Stanford 157 167 1965