A Study of Product Design and Experimental Analysis for the Centrifugal Cooling

The purpose of this study is to investigate a small centrifugal cooling fan applied on notebook computers, which is consisted of a forward-curved impeller and a centrifugal housing. First of all, a basic rotor impeller is designed with the cascade theory. To manufacture the mock-up for experimental verification, the design fan will be expressed in the CAD/CAM format for the CNC machine. All experiment regarding performance characteristic in this analysis is executed in AMCA 210-85 chamber. Thereafter, a parametric study on the geometry of fan is performed to enhance the understanding of the influences caused by those variations. The parameters considered here include the blade number, blade geometry and hub diameter. Experimental results show that blade designed with novel geometry enhances volume flow rate and static pressure outcome. The geometry of blade are demonstrates significant improvements on volume flow rate increment 26.9% and static pressure increment 42.6%. Moreover, an extensive discussion for the influences on above parameters is provided.