Calculation of External Vehicle Aerodynamic Noise Based on LES Subgrid Model

Xingjun Hu, Peng Guo, Zewei Wang, Jingyu Wang, Mo Wang, Jia Zhu and Dejiu Wu
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Xingjun Hu: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Peng Guo: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Zewei Wang: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Jingyu Wang: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Mo Wang: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Jia Zhu: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Dejiu Wu: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China

Energies, 2020, vol. 13, issue 7, 1-17

Abstract: A dynamic Smagorinsky–Lilly model (DSLM) subgrid model on the basis of the Smagorinsky–Lilly subgrid model (SLM) was introduced in the OpenFOAM software. The flow field of the vehicle was simulated, and the pressure coefficient and sound pressure curve of the monitoring points were compared with the wind tunnel test results. The results show that the DSLM subgrid model with a wall function can achieve high simulation accuracy. The investigation of the flow field structure revealed an intermittent detachment of the turbulent vortex after the airflow passed through the rearview mirror, thereby resulting in a violent pressure pulsation on the side window around the rearview mirror. Airflow passed through the A-pillar, separated, and reattached on the upper side window, thereby producing aerodynamic noise. The research results can serve as a good reference for the simulation and test of aerodynamic noises outside the vehicle, and for the reduction of the aerodynamic noises of vehicles.

Keywords: subgrid model; large eddy simulation; wall function; aerodynamic noise (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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