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

Cheng, S. Y.; Tsubokura, M.; Nakashima, T.; Okada, Y.; Nouzawa, T.

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

Cheng, S. Y.; Tsubokura, M.; Nakashima, T. et al.

Journal of Fluids and Structures, 2012, 30, 188-204

Permalink : https://hdl.handle.net/2115/49228

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アクセス権	open access
URI	https://hdl.handle.net/2115/49228
タイトル	Numerical quantification of aerodynamic damping on pitching of vehicle-inspired bluff body
著者	Cheng, S. Y. ; Tsubokura, M. ; Nakashima, T. ; Okada, Y. ; Nouzawa, T.
著者名 Cheng, S. Y.
e-Rad_Researcher 40313366 著者名 Tsubokura, M.
著者名 Nakashima, T.
著者名 Okada, Y.
著者名 Nouzawa, T.
言語	英語
キーワード	Aerodynamic damping
	Vehicle
	Transient aerodynamics
	Pitching
	Oscillation
	LES
発行日	2012-04
出版者	Elsevier
収録物名	Journal of Fluids and Structures
巻(号)	30
ページ	188-204
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0889-9746
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.jfluidstructs.2012.01.002