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

被引：31
|
作者：
Arulprakasajothi, M. [1 ]
Elangovan, K. [2 ]
Reddy, K. Hema Chandra [1 ]
Suresh, S. [3 ]
机构：
[1] Jawaharlal Nehru Technol Univ Anantapur, Dept Mech Engn, Anantapur 515002, Andhra Pradesh, India
[2] Cambridge Inst Technol, Dept Mech Engn, Bangalore 560036, Karnataka, India
[3] Natl Inst Technol, Dept Mech Engn, Tiruchirappalli 620015, India
来源：
FRONTIERS IN ENERGY | 2016年 / 10卷 / 02期
关键词：
Nusselt number; friction factor; conical strip; FRICTION FACTOR CHARACTERISTICS; TRANSFER AUGMENTATION; TRANSFER ENHANCEMENT;
D O I：
10.1007/s11708-015-0389-z
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
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
收藏
页码：136 / 142
页数：7
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