关键词:

槽道热管, 传热传质, 最大传热能力, 毛细力

Abstract:

A theoretical model for fluid flow and heat transfer in a heat pipe with axial “Ω”-shaped grooves was developed and solved numerically to propose the maximum heat transport capability. The model included the effects of the liquid-vapor interfacial shear stress, variation of meniscus radius and contact angle. In the present work, the effect of geometry structure on fluid flow characteristics, the effect of heat load on capillary radius at evaporator end cap, and the effect of wick structure and size on heat transfer performance were analyzed and discussed. The axial distribution of capillary radius, fluid pressure and mean velocity was also proposed. In addition, the calculated maximum heat transport capability of heat pipe at different working temperatures was compared with that from the Chi’s model, in which interfacial shear stress was neglected. And the accuracy of the model was also verified by the experiment.

Key words:

槽道热管, 传热传质, 最大传热能力, 毛细力