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

被引：0
|
作者：
M. Arulprakasajothi
K. Elangovan
K. Hema Chandra Reddy
S. Suresh
机构：
[1] Jawaharlal Nehru Technological University Anantapur,Department of Mechanical Engineering
[2] Cambridge Institute of Technology,Department of Mechanical Engineering
[3] National Institute of Technology,Department of Mechanical Engineering
来源：
Frontiers in Energy | 2016年 / 10卷
关键词：
Nusselt number; friction factor; conical strip;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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.
引用
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页码：136 / 142
页数：6
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