Cheng, See Yuan and Tsubokura, Makoto and Okada, Yoshihiro and Nakashima, Takuji and Nouzawa, Takahide (2013) Aerodynamic Pitching Stability Of Sedan-Type Vehicles Influenced By Pillar-Shape Configurations. In: SAE 2013 World Congress & Exhibition, 16-18 April 2013, Detroit, USA.
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Abstract
The present study investigated the aerodynamic pitching stability of sedan-type vehicles under the influence of A- and C-pillar geometrical configurations. The numerical method used for the investigation is based on the Large Eddy Simulation (LES) method. Whilst, the Arbitrary Lagrangian-Eulerian (ALE) method was employed to realize the prescribed pitching oscillation of vehicles during dynamic pitching and fluid flow coupled simulations. The trailing vortices that shed from the A-pillar and C-pillar edges produced the opposite tendencies on how they affect the aerodynamic pitching stability of vehicles. In particular, the vortex shed from the A-pillar edge tended to enhance the pitching oscillation of vehicle, while the vortex shed from the C-pillar edge tended to suppress it. Hence, the vehicle with rounded A-pillar and angular C-pillar exhibited a higher aerodynamic damping than the vehicle with the opposite A- and C-pillars configurations. The underlying aerodynamic damping mechanism has been verified through flow visualization of phase-averaged results.
Item Type: | Conference or Workshop Item (Paper) |
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Uncontrolled Keywords: | Aerodynamic, Pitch, Simulation and modelling, vehicle body pillars |
Divisions: | Faculty of Mechanical Engineering > Department of Thermal Fluids |
Depositing User: | Dr. See Yuan Cheng |
Date Deposited: | 27 Jan 2014 03:25 |
Last Modified: | 05 Jul 2021 15:38 |
URI: | http://eprints.utem.edu.my/id/eprint/10483 |
Statistic Details: | View Download Statistic |
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