Author : Shahuraj Karape, M. S. Deshmukh and A. A. Pawar

An experimental study of heat transfer in plane circular tube and corrugated tube is performed. The objective of this Project work is to analyses heat transfer coefficient and friction factor characteristics in a circular corrugated tube and compare the result with CFD analysis. The experimentation was firstly carried out for plain circular tube and then for corrugated tube and heat transfer augmentation was recorded. Both these results are compared. All experiments were carried out at the different mass flow rate. In this paper plain circular pipe with 42mm outer diameter and 34mm inner diameter was taken. And corrugated pipe was manufactured by doing internal threading of 6mm pitch and 3mm depth with 600 threading angle. For both readings air is taken as working fluid. At the Reynolds number range of 1000-6100, internal threaded corrugated tube were examined and the result are compared to the plain tube. Result shows that heat transfer enhancement of 1.13-1.19 have been achieved and friction factor range from 0.6 to 1.2.

Keywords: Internally threaded corrugated pipe, heat transfer coefficient, pressure drop.