Horseshoe vortex studies in the passage of a model plate-fin-and-tube heat exchanger
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Dosyalar
Tarih
2008
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
An experimental investigation is reported using particle image velocimetry of the flow structure in the flow through a rectangular duct containing a circular cylinder with axis normal to the flow. A duct with a narrow gap was designed to simulate a fin-tube heat exchanger containing a single circular cylinder. The time-averaged velocity vectors map, < V >, patterns of streamlines, and corresponding vorticity contours, (omega) were obtained using 490 instantaneous images. Development of the entrainment process between the main flow and wake-flow regions is magnified by a helical horseshoe vortex system emerging upstream of the cylinder. The occurrence and development of boundary layer separation and the formation of horseshoe vortices upstream of the cylinder close to both upper and lower plate surfaces and the merging of these developing horseshoe vortices into a primary horseshoe vortex system were also observed in the side-view plane for the Reynolds number range of 1500 <= Re-d <= 6150. (c) 2007 Elsevier Inc. All rights reserved.
Açıklama
Anahtar Kelimeler
horseshoe vortex, fin-tube heat exchanger, PIV, wake flow, confined flow
Kaynak
International Journal of Heat and Fluid Flow
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
29
Sayı
1
