| Autor: |
Weicong Li, Xia Yin, Huifang Li, Caifu Qian, Zhiwei Wu |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Applied Sciences, Vol 12, Iss 14, p 7179 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2076-3417 |
| DOI: |
10.3390/app12147179 |
| Popis: |
Pipe jackets are widely used in engineering as a component for heating or cooling reactors or other equipment. In this paper, fluid flow and heat transfer performances in straight or helical pipes having bow cross-sections with the central angle α in the range of 90–180° were numerically simulated using water as the medium under turbulent flow conditions. The results show that, under the same volume flow rate, the bow cross-sectional pipe with α less than 180° can enhance heat transfer and shows better comprehensive heat transfer performance compared with the half-pipe with α being 180°. As a result, less heat exchange surface (or the weight) of the bow cross-sectional pipe is needed for transferring the same amount of heat. Specifically, for the helical pipe having the bow cross-section with α being 90°, the weight of the pipe can be reduced by about 80%. In order to facilitate the engineering design of bow cross-sectional pipe jackets, correlation formulas for Nu and f of the whole straight pipe and the helical pipe were modified to include the influence of the central angle α of the bow cross-sections. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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