BibTeX:

@article{IJIRSTV2I10031,
     title={Experimental and Numerical Analysis of Heat Transfer Augmentation through a Pipe Using Twisted Tapes},
     author={Yogesh Rakate, Kunal Bhavsar and Dr. S.S. Umale},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={2},
     number={10},
     pages={65--71},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV2I10031.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

The performance of heat exchangers, for single-phase flows in particular, can be improved by many active and passive augmentation techniques. One such passive augmentation technique used for analysis this paper is vortex generation with the help of twisted tapes. An experimental analysis is carried out on a plain tube and tube with twisted tape under different mass flow rates and heat flux. A tube of 48mm diameter and 400mm length was taken for the experiment and a twisted tape of twist ratio yw=9.09 and thickness 2mm with 400mm length was inserted in the tube. Air supplied through the tube was heated up by the band heater. Temperatures of the air at different sections were recorded with the help of thermocouples. These experimental results are then compared with the numerical model for validation. A parametric study is carried out of different twist ratios of twisted tapes on temperature distribution of air at different section of the tube along its length. Three different twist ratios were considered 9.09, 6.05 and 3.64. Among these it was found that the twisted tapes with 3.64 gave an improved heat transfer as compared to other two twist ratios as well as the plain tube.

Augmentation, Vortex Generators, Twisted Tapes, Twist Ratio, CFD