Effect of swirl generator inserted into a tube on exergy transfer: Decaying flow
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Tarih
2014
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor and Francis Inc.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study experimentally investigates the effect of conical injector type swirl generator inserts on heat and exergy transfer in a uniform heat flux tube for turbulence regime. One hundred twenty watts of heat are applied by coiling a flexible silicone heater on the tube (copper pipe) with an inside diameter of 62 mm and length of 1,200 mm. The conical injector type swirl generator has a conical shape, which is similar to a funnel, with angle (?) of 30°, 45°, and 60°. Circular holes are drilled on the conical injector type swirl generator as three different cross-sectional areas (Ah). The total areas (At = N.Ah) of the holes on the conical injector type swirl generator equal each other. Because of this, the three different holes numbers (N) are produced. Flow directors having three different angles (? = 30°, 60°, and 90°) to radial direction are attached to every one of the holes. This study is a typical example for decaying flow. Reynolds number (Re) was varied from 10,000 to 35,000, so the flow was considered as only a turbulent regime. All experiments were conducted with air accordingly; Prandtl number was approximately fixed at 0.71. The local and average heat transfer Nusselt number (Nuh) and exergy transfer Nusselt number (Nue) are calculated and discussed in this article. It is found that the Nuh increases with an increase in Reynolds number, director angle (?), and director diameter (d) but with a decrease in the conical injector type swirl generator angle (?). However, Nue decreases depending on the same independent parameters.
Açıklama
Anahtar Kelimeler
Exergy Transfer, Heat Transfer, Swirl Generator
Kaynak
Experimental Heat Transfer
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
27
Sayı
5
Künye
Kurtbaş, İ., Gülçimen, F., Kılıçarslan, A., Kaya, M. (2014). Effect of swirl generator inserted into a tube on exergy transfer: decaying flow. Experimental Heat Transfer, 27(5), 472-487.
