多头螺旋槽管壁面液膜掺混时的流动状态  

FLOWING STATE OF FALLING LIQUID FILM OUTSIDE A MULTI-FLUTED HELIX TUBE WHEN BLENDING

作　　者：武雅洁[1] 梅宁[1] 梁泽德[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266071

出　　处：《工程热物理学报》2005年第2期280-282,共3页Journal of Engineering Thermophysics

基　　金：教育部留学回国人员启动基金资助项目(教外司留[2000]479号)

摘　　要：本文通过建立小流量液体在水平螺旋槽管外壁面液膜强化传热的拟线性模型,得到了壁面液膜发生流体掺混时液膜的厚度分布,并分析了相邻槽道间发生流体掺混的条件,以及发生流体掺混时液膜的形成过程。结果表明:多头螺旋槽管能够提供一个合适的几何倾斜表面,使得液体不仅能够沿着螺旋槽道流动,而且可以越过槽道的前后缘边界汇入下一个槽道,各螺旋槽道之间发生流体的相互掺混,即实现了二次分布,液膜厚度较掺混前更薄且分布更均匀。In this work, we present a theoretical study of the formation of falling liquid film on the surface of a spirally fluted horizontal tube. The mathematical model for a pure fluid is established based on some physical simplifications. Analytical solutions of liquid film thickness are obtained in the multi-fluted helix tube. In this case, the conditions it must be satisfied are analyzed, and the formation of the liquid film is investigated. The multi-fluted helix tube can provide a suitable geometric slope surface, which allows the fluid flow not only to move along the helical channel but also to cross the boundary of the channel and merge into the fluid flow in the next channel, realizing quadratic distribution of liquid. Consequently, the distribution of the liquid film thickness is thinner in multi-fluted helix tube when compared with the single-fluted tube.

关 键 词：多头螺旋槽管 流体掺混 液膜厚度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]