Effects of Double V Cuts in Perforated Twisted Tape Insert: An Experimental Study

Bipin KumarDepartment of Mechanical Engineering, DIT University, Dehradun, Uttarakhand, India; ;Uttarakhand Technical University, Dehradun, Uttarakhand, India; View further author information

Anil Kumar PatilDepartment of Mechanical Engineering, DIT University, Dehradun, Uttarakhand, India; Correspondence[email protected]
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Siddharth JainDepartment of Mechanical Engineering, College of Engineering, Roorkee, Uttarakhand, IndiaView further author information

Manoj KumarDepartment of Mechanical Engineering, DIT University, Dehradun, Uttarakhand, India; View further author information

Abstract

The thermal performance of heat exchanger is considerably enhanced by the use of inserts. Twisted tape inserts are known for producing large heat transfer enhancements at the expense of fairly large friction penalty. With the objective to explore the effect of twisted tape with perforations and V cuts, the present study investigates the thermo-hydraulic performance of solid twisted tape, perforated twisted tape, and perforated twisted tape with double V cuts for the Reynolds number range of 2000–25000. During the experiments, the twist ratio of tapes is varied in the range of 2–6, while the depth ratio and width ratio of V cuts for perforated twisted tape with double V cuts are varied in the range of 0.2–0.27. The maximum enhancements in Nusselt number and friction factor were found to be 3.5 and 9.63, respectively, corresponding to the perforated twisted tape with double V cuts having V cut depth ratio and width ratio of 0.27 and twist ratio of 2.

Additional information

Notes on contributors

Bipin Kumar

Bipin Kumar has completed his post-graduation in Thermal Engineering from DIT University, Dehradun India. He is currently pursuing PhD from Uttarakhand Technical University, Dehradun India in the field of thermal performance of heat exchanger.

Anil Kumar Patil

Anil Kumar Patil is an Associate Professor in Mechanical Engineering Department of DIT University, Dehradun India. He received his PhD degree from Uttarakhand Technical University, Dehradun India in 2012. His research interests include solar energy utilization, and heat transfer enhancements.

Siddharth Jain

Siddharth Jain is an Associate Professor in Mechanical Engineering Department of College of Engineering Roorkee, India. He received his PhD degree from Indian Institute of Technology, Roorkee, India in 2012. His research interests include internal combustion engines, greenhouse gas mitigation (bioenergy and biofuels); biomass energy systems; energy simulation and modeling; kinetics of biodiesel production; stability studies of biodiesel; integrated renewable energy systems; designing testing of hydro mechanical equipment, small hydropower plant, and renewable energy systems.

Manoj Kumar

Manoj Kumar is a Professor in Mechanical Engineering Department of DIT University, Dehradun India. He received his PhD degree from Indian Institute of Technology, Roorkee, India in 2012. His research interests include heat and mass transfer enhancements.

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