Abstract
At the sunroof opening, the vortex formation will occur in the boundary plane where inner and outer flow will meet. These vorticies are transfered toward downstream and run into the rear opening edge. The pressure fluctuation by this collision sometimes causes the wind throb in the compartment.
In this paper, such a phenomenon is visualized numerically by CFD technique in the three dimensional domain. The relation between vorticity distribution, frequency analysis of pressure fluctuation at the sunroof opening and wind throb is described. The effect of flow deflector which improves the flow pattern around the sunroof opening is also shown and discussed.
