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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v39.i3.50
pages 272-289

Automotive Flow and Acoustic Predictions using Large Eddy Simulations

Bahram Khalighi
General Motors Global R&D, 30500 Mound Rd., MC 480-106-256, Warren, MI 48090, USA
Gianluca Iaccarino
Department of Mechanical Engineering Institute for Computational Mathematical Engineering Stanford University Bldg 500, RM 500-I, Stanford CA 94305 - USA
Yaser Khalighi
Mechanical Engineering Department, Stanford University, Stanford, USA

ABSTRAKT

The external flow field and the aeroacoustic generated by automotive appendices such as the A-pilar rain gutters and outside-rear-view mirrorrs are simulated using Large Eddy Simulation (LES). In the present study the simulations were carried out for three rain gutter geometries and two different mirror models. In these cases the simulation results were compared with the existing experimental data. For the flow around the gutters the agreement was found to be very good (for all three configurations) for the entire range of frequency measured. In addition, the present numerical simulations appear to be more accurate than previously published results obtained for the same geometries using RANS approach. Finally, the simulations of two outside rear view mirror configurations on a flat plate were completed. Calculations carried out on coarse and fine grids were compared to experimental data. In this case averaged pressure and velocity magnitude were compared again demonstrating the accuracy of the present approach.

REFERENZEN

  1. Moin, P., Advances in Large Eddy Simulation Methodology for Complex Flows.

  2. Wang, M., Moin, P., Computation of Quadrupole Noise using Acoustic Analogy.

  3. Wang, M. , Moin, P., Computation of Trailing-Edge Flow and Noise using Large-Eddy Simulation.

  4. Verzicco, R., Iaccarino, G., Fatica, M., Moin, P., and Khalighi, B., LES of Road Vehicle with Drag Reduction Devices.

  5. Mahesh, K., Constantinescu, G., and Moin, P., A Numerical Method for Large Eddy Simulation in Complex Geometries.

  6. Kumarasamy, S. and Karbon, K., Aeroacoustics of an Automobile A-Pillar Rain Gutter: Computational and Experimental Study.

  7. Khalighi, B., Johnson, J. P., Chen, K-H., and Lee, R. G., Experimental Characterization of the Unsteady Flow Field behind Two Outside-Rear-View Mirros.

  8. Lighthill, M. J., On Sound Generated Aerodynamically I: General Theory.


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