Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/6470
Title: Effects of holes placed on perforated finned heat exchangers at different angles on the Nusselt and Reynolds numbers
Authors: Yakar, Gülay
Karabacak, Rasim
Keywords: Convection
Heat exchanger
Heat transfer
Abstract: In this study, 6 mm diameter holes were opened on each circular fin on a heating tube in order to increase convective heat transfer. This is different from other studies in the literature. These holes were placed on the circular fins in such a way as to follow each other at the same chosen angle. The holes created turbulence in a region near the heating tube surface on the bottom of the fin. Experiments were performed to analyze the effect of this turbulence on heat transfer and pressure drop. These experiments were performed at six different angular positions in order to determine the best angular positioning. In addition, a perforated finned heater was compared with an imperforate finned heater to observe the differences. When Nud values were considered for the same air flow rate and the sameR ed, the Nud value of the heater with holes was found to be 2.43% higher than the Nud value of the heater without holes. However, there was a 3.84% decrease in pressure. © 2010 Academic Journals.
URI: https://hdl.handle.net/11499/6470
ISSN: 1992-2248
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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