文档介绍：中国工程热物理学会传热传质学
学术会议论文编号:123321
大空间横管管外自然对流换热
实验与数值模拟分析
李涛,杨广志,陈海龙,李庆领
(青岛科技大学机电工程学院,山东,青岛,266061)
(Tel:********** Email:qustygz1987@)
摘要针对大空间水平圆管管外自然对流换热进行了实验与数值模拟分析,得到了大空间水平圆管自然对流换热的换热系数随管壁温度变化的规律;与现有实验关联式进行了计算对比,并根据实验数据拟合了水平圆管自然对流换热的实验关联式。运用Fluent模拟了水平圆管的自然对流换热过程,发现Boussinesq近似在温差小于40K的情况下能够得到较为准确的结果,通过模拟结果直观的解释了自然对流换热的机理与水平圆管自然对流换热过程中空气流动发展过程。
关键词自然对流换热;大空间水平圆管;Fluent;数值模拟;自然对流流动
中图分类号:TK124 文献标志码:A
Experimental and Numerical Simulation analysis of Natural Convection Heat Transfer on the Outer Surface of Horizontal Pipe in Large Space
Li Tao,Yang Guang-Zhi,Chen Hai-Long,Li Qing-Ling
(College of Electromechanical Engineering, Qingdao University of Science and Technology, Shandong, Qingdao, 266061)
Abstract: Experimental and numerical simulation analysis is taken out for natural convection heat transfer on the outer surface of horizontal pipe in large space, and the variation of the heat transfer coefficients with temperatures of the pipe outer-surface is carried out. paring with the existing experimental correlations, the experimental correlation is calculated by the experimental data. Numerical simulation of natural convection heat transfer of horizontal pipe is carried out through Fluent, finds that Boussinesq approximate is fit for conditions that the temperature difference is less than 40K, and the mechanism and variation of the air flow state of the natu