碩士 / 國立交通大學 / 機械工程系所 / 104 / Mist flow is a two-compound flow produced by mixing the dispersed water droplets with air flow. Mist flow cooling achieved by high heat removal rate by evaporating water droplets to absorb heat. In this study, heat transfer in a single-side heated square channel with hydraulic diameter of 40mm was investigated by infrared thermography. Heat transfer behavior was examined for the cases of smooth surface and finned surface (single row , two rows and staggered arrays) at the Reynold numbers of 7900, 16000, and 24000. The results showed the heat transfer enhancement from mist cooling is 7 times for the smooth surface and at least 2 times for the pin fin surface. In the fin case, heat transfer was dominated by water accumulation and liquid film formation. In a single row and two row arrays, heat transfer enhancement using mist flow was 10 times higher compared to the air flow because of droplets accumulation.
| Identifer | oai:union.ndltd.org:TW/104NCTU5489099 |
| Date | January 2016 |
| Creators | Wang, Szu-Kai, 王思凱 |
| Contributors | Liu, Yao-Hsien, 劉耀先 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 52 |
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