摘要
本文针对多孔介质材料中的自然对流换热问题,通过搭建充满金属泡沫–水的实验装置,探究了金属泡沫–水自然对流换热机理,讨论了加热功率、箱体倾斜角度对方腔内金属泡沫-水两相自然对流换热的影响,实验发现努谢尔数Nu随加热功率的增加而变大,随着倾斜角度的增大而变小,随着金属泡沫孔密度PPI的增大而减小。最终得到了箱体水平放置时5 PPI和10 PPI努谢尔数Nu随瑞利数Ra的变化规律。
In this paper, an experiment apparatus filled with metal foam-water is set up to investigate the problem of natural convection about porous medium. A mechanism of natural convection of metal foam-water is investigated by experiments. Influences of heating power and angle of inclination on natural convection in the cavity filled with metal foam-water are discussed. It is found that the Nusselt number increases with heating power and decreases with the angle of inclination and pore density PPI of metal foam. A correlation of Nusselt number and Raleigh number is obtained when the cavity is horizontal with 5 PPI and 10 PPI.
出处
《渗流力学进展》
2016年第1期1-8,共8页
Advances in Porous Flow
基金
国家自然科学基金:大孔隙率多孔介质中金属骨架导热与固液相变间复杂传热问题的研究(No.51166003)。
