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Sunroof Buffeting of a Simplified Car Model: Simulations of the Acoustic and Flow-induced Responses
Technical Paper
2005-01-2498
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Sunroof buffeting of a simplified car model was investigated experimentally and numerically in order to assess the potential of numerical methods to design sunroofs that are quiet and functional. The numerical results have been obtained using the commercially available software PowerFLOW. The simulation kernel of this software is based on the numerical scheme known as the Lattice Boltzmann Method (LBM), combined with an RNG turbulence model. This scheme accurately captures time-dependent aerodynamic behavior of high Reynolds number flows over complex geometries, together with the acoustic response of resonant systems.
In this work, a simplified car model with a sunroof was used for validation. A simulation methodology to determine the acoustic response of the passenger cabin was investigated and verified experimentally. The sunroof buffeting phenomenon was simulated over a range of flow conditions, and the results were found to be in good agreement with experimental data. Small discrepancies in the buffeting onset and offset velocities were observed, attributed to small geometric and flow differences between physical and simulated domains.
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Crouse, B., Senthooran, S., Balasubramanian, G., Freed, D. et al., "Sunroof Buffeting of a Simplified Car Model: Simulations of the Acoustic and Flow-induced Responses," SAE Technical Paper 2005-01-2498, 2005, https://doi.org/10.4271/2005-01-2498.Also In
References
- Bhatnagar P. Gross E. Krook M. “A model for collision processes in gases. I. small amplitude processes in charged and neutral one-component system” Pys. Rev. 94 511 525 1954
- Chapman S. Cowling T. “The Mathematical Theory of Non-Uniform Gases” Cambridge University Press 1990
- Chen H. “Volumetric Formulation of the Lattice Boltzmann Method for Fluid Dynamics: Basic Concept” Phys. Rev. E 58 1998 3955 3963
- Chen H. Kandasamy H. Orszag S. Shock R. Succi S. Yakhot V. „Extended Boltzmann Kinetic Equation for Turbulent Flows” Science 301 633 636 2003
- Chen H. Orszag S. Staroselsky I. Succi S. „Expanded Analogy between Boltzmann Kinetic Theory of Fluid and Turbulence” J. Fluid Mech. 519 2004 307 314
- Chen S. Doolen G. „Lattice Boltzmann Method for Fluid Flows” Ann. Rev. Fluid Mech. 30 329 364 1998
- Duncan B. Sengupta R. Mallick S. Sims-Williams D. “Numerical Simulation and Spectral Analysis of Pressure Fluctuations in Vehicle Aerodynamic Noise Generation” SAE Paper 2002-01-0597 2002
- Ewins D. “Modal Testing, theory, practice and application” Research Studies Press LTD. Second 2000
- Fares E. “Unsteady Flow Simulation of the Ahmed Reference Body using a Lattice Boltzmann Approach” Elsevier Science 2004
- Kinsler L. Frey A. Coppens A. Sanders J. „Fundamentals of Acoustics” John Wiley & Sons Inc Fourth 2000
- Kook H. Mongeau L. “Analysis of the Periodic Pressure Fluctuations Induced by Flow over a Cavity” J. Sound and Vibr. 251 5 823 846 2002
- Kook H. Mongeau L. Brown D. Zorea S. “Analysis of the interior pressure oscillations induced by flow over vehicle openings” Noise Control Eng. J. 45 6 223 234 1997
- Mongeau L. Brown D. Kook H. “A Predictive Model for the Interior Pressure Oscillations from Flow over Vehicle Openings” SAE Paper 971906 1997
- Kook H. “A Predictive Model for the Interior Pressure Fluctuations in a Flow-Excited Helmholtz Resonator and Active Control using an Oscillated Leading Edge Spoiler” Purdue University, Mech. Eng.
- Nelson P. Halliwell N. Doak P. “Fluid Dynamics of a Flow Excited Resonance, Part II: Flow Acoustic Interaction” J. Sound & Vibr. 91 3 375 402 1983
- Pervaiz M. Teixeira C. “Two Equation Turbulence Modeling with the Lattice-Boltzmann Method” Proc. o. ASME PVP Division Conference Boston 1999
- Qian Y. D'Humieres D. Lallemand P. “Lattice BGK models for the Navier-Stokes equations” Europhys. Lett. 17 479 484 1992
- Ricot D. Maillard V. Bailly C. “Numerical Simulation of the Unsteady Flow Past a Cavity and Application to the Sunroof Buffeting”
- Vaillant O. Maillard V. “Numerical Simulation of Wall Pressure Fluctuation on a simplified Vehicle Shape” AIAA Paper 2003-3271 2003
- Wolf-Gladrow D. “Lattice-Gas Cellular Automata and Lattice Boltzman Models” Springer Verlag Germany 2000
- Yakhot V. Mallick S. Shock R. “Numerical simulation of the excitation of a Helmholtz resonator by a grazing flow” J. Acoust. 114 4 2003
- Zhang R. Chen H. Qian Y.H. Chen S. “Effective volumetric lattice Boltzmann scheme” Physical Review E 63 2001
- Bucher C. “Structural Dynamics” Institute of Structural Mechanics 2002