Record number :
Title of article :
Numerical quantification of aerodynamic damping on pitching of vehicle-inspired bluff body
Author/Authors :
Cheng، نويسنده , , S.Y. and Tsubokura، نويسنده , , M. and Nakashima، نويسنده , , T. and Okada، نويسنده , , Y. and Nouzawa، نويسنده , , T.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
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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.
Keywords :
LES , Transient aerodynamics , pitching , Oscillation , aerodynamic damping , Vehicle
Journal title :
Journal of Fluids and Structures
Journal title :
Journal of Fluids and Structures
Serial Year :
Link To Document :