2007-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/694096摘要：本研究計畫為現正執行之『多孔性沸騰熱傳之研究』的第二、三年期延續計畫。除了在第一階段中，藉由多孔性介質池沸騰實驗與多孔性材質對均熱板性能影響等多孔性內部沸騰現象的探討外，本延續計畫進一步以實驗的方式討論多孔性介質表面的沸騰現象。透過以陽極處理製作多孔性表面，進行多孔性表面的萊氏實驗以及沖擊冷卻實驗，探討多孔性表面對萊氏溫度與冷卻曲線的影響。期望能夠對多孔性表面的沸騰現象與萊氏現象於多孔性表面之作動機制有進一步的瞭解。 奈米流體於熱傳性能提升上的助益已獲得廣泛的重視。已有學者提出奈米流體之熱傳導係數預估模式，以及用實驗的方式實測奈米流體的熱傳性能提升。然而，奈米流體於核沸騰區以外相變熱傳上的表現與奈米流體於多孔性介質中的性能表現，目前付之闕如。因此，在本研究計畫之第三期中，計畫利用先前已建立的實驗設備，以實驗的方法探討奈米流體於池沸騰實驗、均熱板熱傳性能測試、萊氏液滴沸騰實驗以及沖擊冷卻的表現。 <br> Abstract: Beside 1st stage experiments exploring phenomena inside porous media- conducting pool boiling experiments using porous heater and evaluating the effects of porous media on the vapor chamber performance, we are going to design further experiments to discuss the boiling phenomena on the surface of porous media. Porous surfaces will be fabricated by anodizing, and Leidenfrost as well as impingement cooling experiments will be performed on them. The effects of porous surface on the Leidenfrost temperature and cooling curve will be studied. It is expected that the boiling and Leidenfrost phenomena on porous media can be further known. The heat transfer enhancement of nano-fluids has been shown. The prediction models for thermal conductivity and experiments for showing the better heat transfer performance have been presented. However, phase-change research of nano-fluids outside the nuclear boiling regime and performance of nanofluids in porous media are still deficit. In the 3rd stage of this project, by using the constructed apparatus, the pool boiling experiments, vapor chamber performance, Leidenfrost experiments, and impingement cooling will be re-conducted for nano-fluids.多孔性沸騰奈米流體PorousBoilingNanofluid