Record number :
Title of article :
A numerical analysis of transient flow past road vehicles subjected to pitching oscillation
Author/Authors :
Cheng، نويسنده , , S.Y. and Tsubokura، نويسنده , , M. and Nakashima، نويسنده , , T. and Nouzawa، نويسنده , , T. and Okada، نويسنده , , Y.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
From page :
To page :
Abstract :
Conventionally, the pitching instability of road vehicles has been controlled mechanically through the application of suspension systems. The present study demonstrates how unsteady aerodynamics can be exploited for such control by properly configuring vehicle body shapes. To discern the effect of unsteady aerodynamics on road vehicle stability, large eddy simulation has been conducted to simulate the flow past simplified vehicle models. Forced-sinusoidal-pitching oscillation was imposed on the models during the simulation to probe their dynamic responses. Numerical results were compared with wind tunnel measurements for validation, and good agreement is attained. Unsteady flow structures above the rear section of the vehicles were found to significantly affect their pitching stability. Depending on the vehicle body shape configurations, the induced aerodynamic force tended to either enhance or restrain the vehiclesʹ pitching instability.
Keywords :
Vehicle , pitching , LES , stability , Vortex , Transient aerodynamics
Journal title :
Journal of Wind Engineering and Industrial Aerodynamics
Journal title :
Journal of Wind Engineering and Industrial Aerodynamics
Serial Year :
Link To Document :