| Autor: |
M. Muliarchuk, G. Kovalenko, І.І. Borisov, А.А. Khalatov |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Thermophysics and Thermal Power Engineering. 46:16-22 |
| ISSN: |
2663-7235 |
| DOI: |
10.31472/ttpe.3.2022.11 |
| Popis: |
The flow structure and thermo-hydraulic efficiency of cross flow of tube bundles with dimples and helical grooves have been analyzed. The Reynolds number range (103-104) was typical for industrial heat exсhangers. It was found that dimples and grooves decrease scientifically the cylinder wake area and reduces the hydraulic losses. The heat transfer augmentation in five-row tube bundle by dimples is 35-40% while pressure drop increase by 10-15%. The hydraulic resistance of two-row bundle of tube with helical grooves is 20% lower than that of a smooth tube bundle, while heat transfer augmentation is absent. The value of Reynolds analogy factor for tube bundles with dimples and helical grooves exceeds unity. The high thermo-hydraulic efficiency of tube bundles with dimples and helical grooves, allows us to recommend it for practical use in the development of modern heat exchange equipment of the tubular type. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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