Paper Title :Numerical Investigation of Heat Transfer Enhancement in a Tube with Hexagonal Cross Sectioned Coiled Wire
Author :Sibel Gunes, Veysel Ozceyhan, Toygun Dagdevir, Orhan Keklikcioglu
Article Citation :Sibel Gunes ,Veysel Ozceyhan ,Toygun Dagdevir ,Orhan Keklikcioglu ,
(2017 ) " Numerical Investigation of Heat Transfer Enhancement in a Tube with Hexagonal Cross Sectioned Coiled Wire " ,
International Journal of Mechanical and Production Engineering (IJMPE) ,
pp. 96-100,
Volume-5,Issue-10
Abstract : A numerical investigation on heat transfer enhancement in a constant heat-fluxed tube inserted with hexagonal
cross-sectioned coiled wire inserts was performed.The computations were carried out by consideration of with three different
pitch ratios (P/D=1, P/D=2 and P/D=3) and three different hexagon edge length ratios (a/d=0.08, a/d=0.1, a/d=0.12) for
Reynolds numbers between 5000 and 17000, using air as a working fluid. The plain tube results were compared with the works
available in literature for confirmation of the used numerical method. The usage of coiled wire inserts yielded a significant
increase in heat transfer rate and flow friction over the plain tube. Numerical results revealed that Nusselt number and friction
factorrise with the reduction of pitch ratio (P/D) and increment of hexagon edge length ratio (a/d). Eventually, the maximum
thermal enhancement factor of 43% wasprovided for the wire with a/d=0.12 and P/D=1 at Reynolds number of 17000.
Index Terms—Coiled Wire, Flow Friction, Heat Transfer, Thermal Enhancement Factor.
Type : Research paper
Published : Volume-5,Issue-10
DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-9531
View Here
Copyright: © Institute of Research and Journals
| |
 |
| |
 |
PDF |
| |
Viewed - 71 |
| |
Published on 2017-12-11 |
|
