Heat transfer and pressure drop studies in a circular tube fitted with straight full twist

被引：60

作者：

Krishna, Siva Rama ^{[1
]}

Pathipaka, Govardhan ^{[1
]}

Sivashanmugam, P. ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Chem Engn, Heat Transfer Lab, Tiruchirappalli 620015, Tamil Nadu, India

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2009年 / 33卷 / 03期

关键词：

Augmentation; Laminar and turbulent flow; Straight-full twist inserts; Twist ratio; Heat transfer; FRICTION FACTOR CHARACTERISTICS; TURBULENT-FLOW; LAMINAR-FLOW; AUGMENTATION;

D O I：

10.1016/j.expthermflusci.2008.10.007

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experimental investigation of heat transfer characteristics of circular tube fitted with straight full twist insert has been presented. The heat transfer coefficient increases with Reynolds number and decreasing spacer distance with maximum being 2 in. spacer distance for both the type of twist inserts. Also, there is no appreciable increase in heat transfer enhancement in straight full twist insert with 2 in. spacer distance. Experiments were carried out in turbulent flow using straight full twist insert with 4 in. spacer and similar trend of increasing Nusselt number with Reynolds number was observed. Performance evaluation analysis was made and the maximum performance ratio was obtained for each twist insert corresponding to the Reynolds number of 2550. (C) 2008 Published by Elsevier Inc.

引用

页码：431 / 438

页数：8

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