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Title: | Experimental Investigation on Heat Transfer Enhancement by Swirl Generators in a Solar Air Heater Duct |
Authors: | Bhattacharyya, Suvanjan |
Keywords: | Mechanical Engineering Forced convection Heat transfer enhancement Solar air preheater Bluff Cylinders Swirl flow |
Issue Date: | Jun-2016 |
Publisher: | IJHT |
Abstract: | Experimental investigations on heat transfer enhancement by swirl generators are presented. The thermo hydraulic performance has been evaluated. The experiments were conducted over a wide range of Reynolds number from 993 to 12,034 by employing air (Pr = 0.7) as the working fluid. The major findings of this experimental investigation are that the circular grooved tube with different diameter ratio (h = d/D = 0.04 and 0.06) and pitch ratio (y = p/D = 1.5 and 3.0) perform better than the smooth duct. In evaluation of thermal performance, it is seen that the bluff cylinder of (y = 1.5, h =0.06) are thermodynamically advantageous than the other roughness used. The result is useful for heat exchanger, solar air-heater, etc. |
URI: | https://iieta.org/sites/default/files/Journals/IJHT/34.2_06.pdf http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/12382 |
Appears in Collections: | Department of Mechanical engineering |
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