Experimental investigation on strip inserts in a circular tube heat transfer effect of conical under laminar flow

The aim of this paper is to observe the Nusselt number and friction factor behavior of the circular tube with conical strip inserts as turbulators in a laminar flow condition, using staggered and non-staggered conical strips with three different twist ratios （Y = 2, 3 and 5）. The conical strip is in...

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Bibliographic Details
Published in:能源前沿：英文版 2016 (2), p.136-142
Main Author: M. ARULPRAKASAJOTHI K. ELANGOVAN K. HEMA CHANDRA REDDY S. SURESH
Format: Article
Language:English
Subjects:
几何形状
回归分析
实验
层流
摩擦系数
流体流动
热效应
锥管
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Summary:The aim of this paper is to observe the Nusselt number and friction factor behavior of the circular tube with conical strip inserts as turbulators in a laminar flow condition, using staggered and non-staggered conical strips with three different twist ratios （Y = 2, 3 and 5）. The conical strip is inserted in the forward and backward direction individually compared to the flow of water which is the working fluid. The results indicate that the conical strip inserts increases the Nusselt number when compared to the plain surface tube. It is observed that the strip geometry has a major effect on the thermal performance of the circular tube. On examination of different strips for determining the enhancement of Nusselt number, the staggered conical strip with the twist ratio of Y = 3 has given a better result compared to the other two strips. Finally, correlations have been derived using regression analysis for predicting the Nusselt number and friction factor.
ISSN:2095-1701
2095-1698