ЗАСТОСУВАННЯ ЗАГЛИБЛЕНЬ ТА ГВИНТОВИХ КАНАВОК НА ЗОВНІШНІЙ ПОВЕРХНІ ТРУБ ДЛЯ ПІДВИЩЕННЯ ТЕПЛОГІДРАВЛІЧНОЇ ЕФЕКТИВНОСТІ ТРУБНИХ ПУЧКІВ ПРИ ПОПЕРЕЧНОМУ ОБТІКАННІ
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 a...
Gespeichert in:
| Datum: | 2022 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | Ukrainian |
| Veröffentlicht: |
Institute of Engineering Thermophysics of NAS of Ukraine
2022
|
| Online Zugang: | https://ihe.nas.gov.ua/index.php/journal/article/view/497 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Назва журналу: | Thermophysics and Thermal Power Engineering |
Institution
Thermophysics and Thermal Power Engineering| Zusammenfassung: | 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. |
|---|