碩士 / 國立成功大學 / 機械工程學系 / 89 / ABSTRACT
This paper includes two parts. The first one is a three-dimensional numerical thermal-hydraulic study of the slit fin and tube heat exchanger. The second one is to measure the local heat transfer coefficient for the staggered and in-lined fin and tube heat exchangers using the infrared thermovision.
In the numerical study of the slit finned-tube heat exchanger： Two different slit numbers (2 and 4) are investigated in detail for the Reynolds number ReH (based on the fin spacing and frontal velocity) ranging from 100 to 1100. Numerical results indicate that as the slit numbers are increased from 2 to 4, the average Nusselt number is increased from 6.9 to 27.8% compared to the plain fin surface.
In infrared thermovision experimental part: The testes were performed in an open wind tunnel with infrared thermovision to measure the thermal field on the fin surface. The results indicated that for equal Reynolds number, the heat transfer coefficient for the staggered arrangement is 15% higher than that for in-lined arrangement.
| Identifer | oai:union.ndltd.org:TW/089NCKU0489024 |
| Date | January 2001 |
| Creators | Nan-Zhe Ye, 葉哲男 |
| Contributors | Jin-Yuh Jang, 張錦裕 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 101 |
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