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• W2130031082 endingPage "1249" @default.
• W2130031082 startingPage "1242" @default.
• W2130031082 abstract "Effects of combined ribs and winglet type vortex generators (WVGs) on forced convection heat transfer and friction loss behaviors for turbulent airflow through a constant heat flux channel are experimentally investigated in the present work. The cross-section of the ribs placed inside the opposite channel walls to create a reverse flow is an isosceles triangle shape. Two rib arrangements, namely, in-line and staggered arrays, are introduced. Also, two pairs of the WVGs with various attack angles (α) of 60°, 45° and 30° are mounted on the test duct entrance to create a longitudinal vortex flow through the test channel. Measurements are carried out for a rectangular duct of aspect ratio, AR = 10 and height, H = 30 mm with a single rib height, e/H = 0.13 and rib pitch, P/H = 1.33. The flow rate is in terms of Reynolds numbers based on the inlet hydraulic diameter of the channel ranging from 5000 to 22,000. The experimental results show a significant effect of the presence of the rib turbulator and the WVGs on the heat transfer rate and friction loss over the smooth wall channel. The values of Nusselt number and friction factor for utilizing both the rib and the WVGs are found to be considerably higher than those for using the rib or the WVGs alone. The larger the attack angle value leads to higher heat transfer and friction loss than the lower one. The in-line rib together with the WVGs provides higher heat transfer and friction loss than the staggered one for similar operating conditions. In common with the WVGs, the in-line rib yields the highest increase in both the Nusselt number and the friction factor but the rib with staggered array shows better thermal performance than the others." @default.
• W2130031082 created "2016-06-24" @default.
• W2130031082 creator A5039527182 @default.
• W2130031082 creator A5047971197 @default.
• W2130031082 creator A5048274647 @default.
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• W2130031082 date "2010-06-01" @default.
• W2130031082 modified "2023-10-18" @default.
• W2130031082 title "Enhanced heat transfer in a triangular ribbed channel with longitudinal vortex generators" @default.
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• W2130031082 doi "https://doi.org/10.1016/j.enconman.2009.12.035" @default.
• W2130031082 hasPublicationYear "2010" @default.
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