5727 Experimental study of excitation mechanism of flow-induced disk vibration of HDD

Abstract

This paper deals with the excitation mechanism of the flow induced disk vibration of HDD on the shroud opening. The flow condition is examined by the tuft method and the pressure sensor. The excitation force is considered to the flow component in the disk perpendicular direction due to the pressure distribution in the shroud opening. There is the relation between the pressure characteristics due to the flow component and the characteristics of the disk vibration. Installing a spoiler is effective to reduce disk vibration and it is confirmed in terms of the pressure characteristics.