PIV measurements of flow past a confined cylinder
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Dosyalar
Tarih
2008
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study investigates the flow past a confined circular cylinder built into a narrow rectangular duct with a Reynolds number range of 1,500 ? Re d ? 6,150, by employing the particle image velocimetry technique. In order to better explain the 3-D flow behaviour in the juncture regions of the lower and upper plates and the cylinder, respectively, as well as the dynamics of the horseshoe vortex system, both time-averaged and instantaneous flow data are presented for regions upstream and downstream of the cylinder. The size, intensity and interaction of the vortex systems vary substantially with the Reynolds number. Although the narrow rectangular duct with a single built-in cylinder is a geometrically symmetrical arrrangement, instantaneous flow data have revealed that the flow structures in both the lower and upper plate-cylinder junction regions are not symmetrical with respect to the centreline of the flow passage. The vortical flow structures obtained in side-view planes become dominant sometimes in the lower juncture region and sometimes in the upper juncture region in unsteady mode. © 2008 Springer-Verlag.
Açıklama
Anahtar Kelimeler
Ducts, Flow structure, Image analysis, Reynolds number, Velocity measurement, Vortex flow, Ducts, Flow structure, Image analysis, Reynolds number, Vortex flow, Horseshoe vortex system, Plate-cylinder junction, Velocity measurement
Kaynak
Experiments in Fluids
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
44
Sayı
6
