Thermal performance of elliptical pins on a semicircular concave surface in the staggered array jet impingement cooling

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dc.authoridOZEL, MEHMET BERKANT/0000-0002-2439-1494
dc.authoridYalcinkaya, Orhan/0000-0003-2380-1727
dc.authoridDurmaz, Ufuk/0000-0001-5534-8117
dc.contributor.authorYalcinkaya, Orhan
dc.contributor.authorDurmaz, Ufuk
dc.contributor.authorTepe, Ahmet Umit
dc.contributor.authorUysal, Unal
dc.contributor.authorOzel, Mehmet Berkant
dc.date.accessioned2025-03-17T12:27:27Z
dc.date.available2025-03-17T12:27:27Z
dc.date.issued2023
dc.departmentTarsus Üniversitesi
dc.description.abstractIn a jet impingement cooling, decreasing heat transfer on the last jet's region due to the strong crossflow significantly increases thermal stress on the material. Thus, the main objectives of this study are to achieve relatively more uniform heat transfer distribution and enhance heat transfer on the surface compared to conventional jet impingement cooling (CJIC) configuration by mounting elliptical pins on the impingement regions. From this point of view, we have investigated the thermal performance of elliptical pins mounted on the impingement region of a staggered array jet impingement cooling (SJIC) on the semicircular concave surface. Numerical analyses were performed under various Reynolds numbers (Re = 5000, 15000, and 25000), jet nozzleto-target surface spacing (0.5 & LE; G/d & LE; 8.0), and dimensionless orifice plate-target surface gaps (H/d = 4.0 and 8.0). Average Nusselt (Nu) numbers, local Nu contours, flow properties, and Thermal Performance Factor (TPF) on pinned and smooth target surfaces were studied in detail. Results showed that the local and area-averaged Nu numbers increased with reducing G/d and roughening of the surface with elliptical pins compared to conventional SJIC. Maximum heat transfer enhancement was obtained as 55.68% at H/d = 8.0 with extended jets (G/d = 0.5) and elliptical pin roughening surface design. Besides, the highest TPF on the pinned surface is achieved as 1.10 by G/d = 2.0 and H/d = 8.0 at Re = 25000. Furthermore, mounting elliptical pins on the surface provided more uniform heat transfer distribution on the surface compared to flat surface by means of significantly enhancing heat transfer on the last jet region.
dc.identifier.doi10.1016/j.applthermaleng.2023.120998
dc.identifier.issn1359-4311
dc.identifier.issn1873-5606
dc.identifier.scopus2-s2.0-85162989079
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.applthermaleng.2023.120998
dc.identifier.urihttps://hdl.handle.net/20.500.13099/2262
dc.identifier.volume231
dc.identifier.wosWOS:001034246200001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofApplied Thermal Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250316
dc.subjectStaggered jet array
dc.subjectExtended jet impingement
dc.subjectInclined jet
dc.subjectRoughness element
dc.subjectPin-fin
dc.subjectCFD
dc.titleThermal performance of elliptical pins on a semicircular concave surface in the staggered array jet impingement cooling
dc.typeArticle

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