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Optimal design of the semi-dimple vortex generator in the fin and tube heat exchanger.
- Source :
-
International Journal of Heat & Mass Transfer . May2018, Vol. 120, p1173-1186. 14p. - Publication Year :
- 2018
-
Abstract
- The fin and tube heat exchanger with a semi-dimple pair is numerically studied in terms of the air side’s thermal performance. The investigated parameters consist of the diameter, attack angle and the placed location of the semi-dimple. The results show that the 30° attack angle, 5.5 mm vertical distance and 7.5 mm horizontal distance can perform the highest j/f ratio or “goodness parameter” of every semi-dimple’s diameter. Additionally, the thermal performance of the fin with a semi-dimple pair is also compared with that of the fin with existing semi-dimples and the plain fin within the Reynolds number ranging from 813 to 4019. Obviously, the existing semi-dimple exhibits the highest heat transfer coefficient and pressure drop. However, the semi-dimples’ pair demonstrates a goodness factor of 33–37% greater than the existing semi-dimples and 15–20% greater than the plain fin, approximately. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00179310
- Volume :
- 120
- Database :
- Academic Search Index
- Journal :
- International Journal of Heat & Mass Transfer
- Publication Type :
- Academic Journal
- Accession number :
- 127387487
- Full Text :
- https://doi.org/10.1016/j.ijheatmasstransfer.2017.11.121