Aerodynamic Pitching Stability Of Sedan-Type Vehicles Influenced By Pillar-Shape Configurations

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)
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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