Number：

04095003

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Name：

曾憲中

Titles：

Associate professor

Author：

Tzer-Ming Jeng(鄭澤明),Sheng-Chung Tzeng(曾憲中),Feng-Zhang Tang(湯豐彰)

Paper name：

Effect of rotation on heat transfer of a rotating pin-fin heat sink

with jet impinging cooling

Name of activity：

2006年輸送現象及其應用研討會

Keywords：Heat transfer, jet Impingement,Pin-fin heat sink, Rotation

Abstract：This work experimentally investigated the heat transfer enhancement of jet impingement onto the rotating heat sink. Air was used as impinging coolant,while a square pin-fin heat sink with uniformly in-line arrangement was employed. Variable parameters where the jet Reynolds number (Re) and the rotational Reynolds number (Re_r ). The effects of Re and Re_r on the average Nusselt number were presented. The results indicate that the heat transfer with pin-fins was 2~3 time without pin-fins. Additionally, in the case of smaller Re ,the rotation enhanced greatly Nusselt number, but the heat transfer enhancement by rotation decreased with increasing Re. In the present tests, the heat transfer enhancement by rotation decreased with increasing Re. In the present tests, the heat transfer enhancement by rotation at Re≧9667 was not obvious.

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