Numerical Quantification Of Aerodynamic Damping On Pitching Of Vehicle-Inspired Bluff Body

Tsubokura, Makoto and Cheng, See Yuan and Nakashima, Takuji and Okada, Yoshihiro and Nouzawa, Takahide (2012) Numerical Quantification Of Aerodynamic Damping On Pitching Of Vehicle-Inspired Bluff Body. Journal of Fluids and Structures, 30. pp. 188-204. ISSN 08899746

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Abstract

The influence of transient flows on vehicle stability was investigated by large eddy simulation. To consider the dynamic response of a vehicle to real-life transient aerodynamics, a dimensionless parameter that quantifies the amount of aerodynamic damping for vehicle subjects to pitching oscillation is proposed. Two vehicle models with different stability characteristics were created to verify the parameter. For idealized notchback models, underbody has the highest contribution to the total aerodynamic damping, which was up to 69%. However, the difference between the aerodynamic damping of models with distinct A- and C-pillar configurations mainly depends on the trunk-deck contribution. Comparison between dynamically obtained phase-averaged pitching moment with quasi-steady values shows totally different aerodynamic behaviors.

Item Type:	Article
Uncontrolled Keywords:	Aerodynamic damping, Vehicle, Transient aerodynamics, Pitching, Oscillation, LES
Divisions:	Faculty of Mechanical Engineering > Department of Thermal Fluids
Depositing User:	Dr. See Yuan Cheng
Date Deposited:	26 Aug 2013 07:16
Last Modified:	05 Jul 2021 14:41
URI:	http://eprints.utem.edu.my/id/eprint/9030
Statistic Details:	View Download Statistic

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