Heat transfer and friction factor characteristics of annuli formed by the smooth inner tube and corrugated outer tube - An experimental study

被引：19

作者：

Yadav, Saurabh ^{[1
]}

Sahu, Santosh K. ^{[1
]}

机构：

[1] Indian Inst Technol, Discipline Mech Engn, Indore 453552, Madhya Pradesh, India

来源：

EXPERIMENTAL HEAT TRANSFER | 2020年 / 33卷 / 01期

关键词：

Corrugated tubes; heat exchanger; Nusselt number; thermal performance factor; friction factor; MULTIOBJECTIVE SHAPE OPTIMIZATION; PRESSURE-DROP CHARACTERISTICS; TRANSFER ENHANCEMENT; FLUID-FLOW; CIRCULAR TUBE; TRANSFER AUGMENTATION; TURBULENT-FLOW; EXCHANGER; PERFORMANCE; TRANSITION;

D O I：

10.1080/08916152.2019.1569179

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The heat transfer characteristic in the annulus of a double pipe heat exchanger using the corrugated outer tube is analyzed with three corrugation pitches (10, 20, and 30 mm), three diameter ratios (0.53, 0.44, and 0.40), and Reynolds number range 3500-10,500. Tests are conducted for air as a working fluid. The heat exchanger with least pitch and diameter ratio is found to exhibit the highest Nusselt number and pressure drop. The maximum enhancement in the Nusselt number and friction factor is found to be 71% and 81%, respectively. In addition, correlations have been developed for Nusselt number, friction factor, and thermal performance factor.

引用

页码：18 / 39

页数：22

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