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Numerical quantification of aerodynamic damping on pitching of vehicle-inspired bluff body

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Title: Numerical quantification of aerodynamic damping on pitching of vehicle-inspired bluff body
Authors: Cheng, S. Y. Browse this author
Tsubokura, M. Browse this author →KAKEN DB
Nakashima, T. Browse this author
Okada, Y. Browse this author
Nouzawa, T. Browse this author
Keywords: Aerodynamic damping
Transient aerodynamics
Issue Date: Apr-2012
Publisher: Elsevier
Journal Title: Journal of Fluids and Structures
Volume: 30
Start Page: 188
End Page: 204
Publisher DOI: 10.1016/j.jfluidstructs.2012.01.002
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.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 坪倉 誠

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