Unsteady Aerodynamic Analysis around Oscillating Ahmed body by LS-DYNA ver.980

This paper describes an aerodynamic effect of the Ahmed body model in sinusoidal pitching motion. Relationships of pitching angle to lift coefficient were analyzed by computational fluid dynamics (CFD) of LS-DYNA ver.980. Those numerical results showed good agreements with wind tunnel test results reported in the past. The flow field was investigated by using this numerical analysis result and the relationship of bottom surface pressure distribution to the lift coefficient was clarified.