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

被引：28

作者：

Cheng, S. Y. ^{[1
,2
]}

Tsubokura, M. ^{[1
]}

Nakashima, T. ^{[3
]}

Okada, Y. ^{[4
]}

Nouzawa, T. ^{[4
]}

机构：

[1] Hokkaido Univ, Grad Sch Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

[2] Univ Teknikal Malaysia Melaka, Fac Mech Engn, Durian Tunggal 76100, Melaka, Malaysia

[3] Hiroshima Univ, Grad Sch Engn, Hiroshima 739857, Japan

[4] Mazda Motor Corp, Vehicle Testing & Res Dept, Hiroshima 7308670, Japan

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 2012年 / 30卷

关键词：

Aerodynamic damping; Vehicle; Transient aerodynamics; Pitching; Oscillation; LES; HIGH CROSS WINDS; ROAD VEHICLES; GROUND VEHICLES; INDUCED VIBRATION; FORCES; FLOW; ACCIDENTS;

D O I：

10.1016/j.jfluidstructs.2012.01.002

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

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. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：188 / 204

页数：17

共 12 条

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