Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube

dagdevir, toygun

doi:10.26701/ems.1210740

Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube

Toygun DAĞDEVİR (Erciyes Üniversitesi, Makine Mühendisliği Bölümü, Kayseri, Türkiye)

European Mechanical Science

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Yıl: 2023 Cilt: 7 Sayı: 2 Sayfa Aralığı: 41 - 48 Metin Dili: İngilizce DOI: 10.26701/ems.1210740 İndeks Tarihi: 20-06-2023

Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube

Öz:

This work reveals the heat transfer and flow characteristic in a twisted and oval tube under turbulent flow and constant heat flux conditions. Numerical analyses were carried out on several twisted and oval tube configurations. In order to clearly reveal the effect of dimples in the swirl flow, the twisted oval tubes with and without dimples are considered. In order to enhance the convective heat transfer, the dimples were placed in the narrowing region of the twisted tube where the heat transfer was inefficient. The results indicate that the dimples on the twisted tube significantly increase the heat transfer, although they cause to slightly increase pressure drop penalty. While the decrease in the pitch length induced to enhance the heat transfer, it significantly and negatively affected the hydraulic performance of the tube. Furthermore, while the dimples on the twisted oval tube induce the average Nusselt number to increase by 14.8%, they cause to the friction factor increase by 18.0%. The best configuration that is the case of dimpled twisted oval tube having pitch length of 200 mm at Reynolds number of 10,000, yields thermo-hydraulic performance criteria of 1.428.

Anahtar Kelime: heat transfer enhancement thermo-hydraulic performance twisted oval tube dimpled tube.

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	dagdevir t (2023). Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. , 41 - 48. 10.26701/ems.1210740
Chicago	dagdevir toygun Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. (2023): 41 - 48. 10.26701/ems.1210740
MLA	dagdevir toygun Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. , 2023, ss.41 - 48. 10.26701/ems.1210740
AMA	dagdevir t Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. . 2023; 41 - 48. 10.26701/ems.1210740
Vancouver	dagdevir t Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. . 2023; 41 - 48. 10.26701/ems.1210740
IEEE	dagdevir t "Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube." , ss.41 - 48, 2023. 10.26701/ems.1210740
ISNAD	dagdevir, toygun. "Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube". (2023), 41-48. https://doi.org/10.26701/ems.1210740

APA	dagdevir t (2023). Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. European Mechanical Science, 7(2), 41 - 48. 10.26701/ems.1210740
Chicago	dagdevir toygun Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. European Mechanical Science 7, no.2 (2023): 41 - 48. 10.26701/ems.1210740
MLA	dagdevir toygun Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. European Mechanical Science, vol.7, no.2, 2023, ss.41 - 48. 10.26701/ems.1210740
AMA	dagdevir t Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. European Mechanical Science. 2023; 7(2): 41 - 48. 10.26701/ems.1210740
Vancouver	dagdevir t Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube. European Mechanical Science. 2023; 7(2): 41 - 48. 10.26701/ems.1210740
IEEE	dagdevir t "Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube." European Mechanical Science, 7, ss.41 - 48, 2023. 10.26701/ems.1210740
ISNAD	dagdevir, toygun. "Analysis on enhanced turbulent heat transfer and flow characteristic in a twisted and dimpled oval tube". European Mechanical Science 7/2 (2023), 41-48. https://doi.org/10.26701/ems.1210740