An Integrated Numerical and Experimental Study of a Novel Centrifugal Fan

• Main Authors: Chih-Cheng Chou, 周志成
• Other Authors: Sheam-Chyun Lin
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/44z53a

碩士 === 國立臺灣科技大學 === 機械工程系 === 94 === This work aims to design a small blower for the thermal task of laptop computers by using an integrated scheme, which consists of fan design, mockup manufacture, experimental verification, and numerical simulation. In the fan design, a high-performance fan (60×60×15 mm3) is constructed with the aids of flow visualization on the entire flow patterns via the CFD means. Then, to further enhance fan performance and realize the corresponding influences caused by varying the fan geometry, a parametric study is executed with the emphasis on the rotor inner diameter, the blade curvature, the cut-off angle, and the inlet diameter. Thereafter, prototypes are manufactured by the CNC machine to carry out the corresponding experimental verifications. To ensure a reliable outcome, the fan’s performance and noise tests are performed in the AMCA-210 and semi-anechoic chambers following CNS-8753 code. The experimental results show that the deviations between numerical simulations and experiments are within 10%. This fact represents a great potential to reduce the expensive and tedious experimental work by using CFD tools. Besides, the results show that there is an optimum value existed for each parameter considered here. Also, the dominant parameters for increasing the aerodynamic performance and noise reduction of a blower are the inlet diameter and the blade curvature, respectively. In addition, an extensive discussion on these parameters is summarized to serve as the design guideline for small cooling blowers for notebook computers.