学位論文

スモールファンのダウンサイジングにおける損失発生メカニズムの検討

EXAMINATION OF LOSS GENERATION MECHANISM IN DOWNSIZING OF SMALL FAN

jpn

2013-03-24

Not Applicable (or Unknown)

2013-03-24

修士(工学)

工学研究科機械工学専攻; 指導教授: 御法川学

Small fan has an important role for cooling in information technology devices such as note PC, projector, multi-functional printer and so on. At present, almost of all devices have one or more small fans for the cooling system. The downsizing of devices has been accelerated and the small fan has been smaller and smaller. However, the efficiency of the small fan which impeller diameter is up to 60mm is extremely low due to large amount loss of flow. The small fans have relatively large tip clearance, thick blade and large hub, comparing with larger fans for industrial use. The present study is an attempt to clarify the loss generation mechanism occurred by such characteristics of small fan. Various kinds of small fan were designed and calculated the performance and the internal flow by CFD and the fans were fabricated and tested.

Thesis