Parametric study of natural convection over horizontal annular finned tube

作     者：H. NEMATI M. MORADAGHAY H. NEMATI;M. MORADAGHAY

作者机构：Department of Mechanics Marvdasht Branch Islamic Azad University Marvdasht Iran Department of Mechanics Shiraz Branch Islamic Azad University Shiraz Iran 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2019年第26卷第8期

页      面：2077-2087页

核心收录：

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：natural convection fin spacing parametric study annular finned tube 

摘      要：Natural convection heat transfer from annular finned tubes was studied numerically. Effects of fin spacing, temperature difference and tube diameter on flow pathlines and local heat transfer were also studied. It was shown that pathlines remain mostly circular for different geometries. Moreover, the contributions of fin periphery, fin side and bare tube to heat transfer were specified. It was shown that the heat transfer per unit area of fin periphery can be several times that of other parts. Moreover, in higher finspacing, the heat transfer from the bare tube can be more important than fin sides.