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鄭澤明02

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鄭澤明(Tzer-Ming Jeng)、曾憲中(Sheng-Chung Tzeng) 、黃昱翔(Yu-Xiang Huang)、劉啟煌(Chi-Huang Liu)

Paper name：

往復運動之鰭柱散熱座於45度角圓形噴流下之流動與熱傳特性

FLUID FLOW AND HEAT TRANSFER CHARACTERISTICS OF THE

RECIPROCATING-MOVE PIN-FIN HEAT SINK UNDER 45-DEG CIRCULAR JETS

Name of activity：

2013航空太空科技研討會

Aerospace Technology Conference 2013

Keywords：往復運動；鰭柱散熱座、熱傳、流場觀測、傾斜衝擊噴流

Reciprocating move, pin-fin heat sink, heat transfer, flow visualization, oblique impinging jet.

Abstract：本研究以實驗方法討論往復運動效應對鰭柱散熱座於45度角圓形衝擊噴流下得熱傳增益，強制對冷卻系統通常運用穩態穩流流過靜止目標物，本研究將鰭柱散熱座裝置在一往復運動之平台上，同時安排傾斜45度角之噴流衝擊鰭柱散熱座，實驗結果指出，當平台上下往復運得息程過長時會使得散熱座的整體熱傳能力下降；而往因為平台左右往復運動得形成沒有過長，所以其對應之整體熱傳能力會被左右往復運度所增強，此外，較長的噴流道測試段的距離會產生較大的整體熱傳性能，最後，本研究完成一下列德煙場觀測，除可辨明流動行為，更可輔助解釋對應的熱傳特性。

This work experimentally investigated the effect of the reciprocating move on the heat transfer enhancement of the pin-fin heat sinks with 45-deg circular impinging jets. The forced convective cooling system usually applies the steady flow to pass through a stationary target. This work mounted pin-fin heat sinks onto a reciprocating-move platform with the oblique impinging air jets. The experimental results indicate that the overall heat transfer of the pin-fin heat sinks would drop when the reciprocating-move stroke of the platform moving up and down was too long; while the overall heat transfer was enhanced by the left and right reciprocating-move of the platform since that the stroke was not too long. Besides, the longer distance between the jet nozzle and the test section was desired for the higher overall heat transfer performance. Finally, the smoke flow visualizations were performed to identify the fluid flow behaviors and explain the corresponding heat transfer characteristics.

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