Experimental Study of Heat Transfer Augmentation Characteristics of a Tube Affected by Geometric Parameters of Coiled Spring Inserts
| Autor: | Arvind Ashok Kapse, Vinod Chimanrao Shewale |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Journal of Heat and Mass Transfer Research, Vol 11, Iss 1, Pp 127-138 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2345-508X 2383-3068 |
| DOI: | 10.22075/jhmtr.2024.30106.1426 |
| Popis: | In the present study, the heat transfer and flow friction characteristics of a circular tube with coiled spring inserts are experimentally reported for a fully developed turbulent flow regime. Experimental investigations were performed in a circular concentric tube in a tube heat exchanger in the Reynolds number (Re) range of 8000–32,000 with water as a working fluid. The average Nusselt number ratio (Nua/Nup) and average friction factor ratio (fa/fp) with and without inserts are reported to be in the range of 1.79–2.79 and 2.44–4.17, respectively, for the tested six geometries of the inserts. The Nusselt number ratio (Nua/Nuc) based on equal pumping power criteria is also reported and found to be in the range of 0.94–1.24. The effects of varying pitch to length of insert ratio (p/l) and diameter of insert to the inner diameter of tube ratio (dc/Di) on heat transfer and pressure drop are reported, and empirical correlation is given for Nusselt number in terms of Reynolds number (Re), pitch to length of insert ratio (p/l), insert diameter to inner diameter of tube ratio (dc/Di), and Prandtl number (Pr). |
| Databáze: | Directory of Open Access Journals |
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