Assessment of Convective Heat Transfer Characteristics for Elliptical-Shaped Pin-Roughened Surface for the Jet Impingement Cooling

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dc.authoridDurmaz, Ufuk/0000-0001-5534-8117
dc.authoridUYSAL, UNAL/0000-0001-8330-4461
dc.authoridOZEL, MEHMET BERKANT/0000-0002-2439-1494
dc.authoridYalcinkaya, Orhan/0000-0003-2380-1727
dc.contributor.authorYalcinkaya, Orhan
dc.contributor.authorDurmaz, Ufuk
dc.contributor.authorTepe, Ahmet Umit
dc.contributor.authorUysal, Unal
dc.contributor.authorOzel, Mehmet Berkant
dc.date.accessioned2025-03-17T12:25:36Z
dc.date.available2025-03-17T12:25:36Z
dc.date.issued2023
dc.departmentTarsus Üniversitesi
dc.description.abstractIn a jet impingement cooling (JIC) system, the layout of the target surface and length of the jet holes can change both the flow field and the heat transfer characteristics. Elliptical-shaped pins (ESPs) with different heights and layouts on the target surface of the extended jet hole configurations were examined numerically in a jet impingement system. The ESPs were arranged in a staggered and circular form. Normalized nozzle length (G(j)/D-j = 1.0, 2.0, 6.0) and normalized pin height (H-p/D-j = 0, 0.167, 0.417, 0.667) were investigated as geometric parameters. Also, the effect of different pin layouts (R-1, R-2, R-3) on heat transfer dissipation was studied by changing the number of pin rows in particular configurations. A numerical model was developed and verified with experimental and numerical data from the literature. Numerical analyses were conducted with the shear stress transport (SST) k-omega turbulence model taking the boundary conditions into account under turbulent flow conditions (16,250 <= Re <= 32,500). Nusselt (Nu) numbers, pressure drop, and the thermo-hydraulic performance of the physical model were quantitatively researched to elucidate the underlying mechanisms of enhanced heat transfer by the ESPs. Results were compared with the orifice surface (H-p/D-j = 0 and G(j)/D-j = 6.0). Results showed that area-averaged Nu number on the target wall increased up to 35.82% for Re = 16,250 by R-2_G(j)/D-j = 1.0 and H-p/D-j = 0.167 compared to the conventional JIC system. The performance evaluation criterion (PEC) was used to analyze the thermo-hydraulic performance of the examined physical models. According to the PEC values, the most feasible parameters for all Re numbers were R-3_G(j)/D-j = 1.0 and H-p/D-j = 0.167. Furthermore, increasing the number of pin rows in the channel also increased the uniformity of the local heat transfer distribution according to Nu contours.
dc.identifier.doi10.1115/1.4055940
dc.identifier.issn2832-8450
dc.identifier.issn2832-8469
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85143988705
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1115/1.4055940
dc.identifier.urihttps://hdl.handle.net/20.500.13099/1773
dc.identifier.volume145
dc.identifier.wosWOS:000976830200003
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAsme
dc.relation.ispartofAsme Journal of Heat and Mass Transfer
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250316
dc.subjectjet impingement
dc.subjectroughness element
dc.subjectpin layout
dc.subjectconvection heat transfer
dc.subjectCFD
dc.titleAssessment of Convective Heat Transfer Characteristics for Elliptical-Shaped Pin-Roughened Surface for the Jet Impingement Cooling
dc.typeArticle

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