薄层毛细多孔介质湿区干燥过程相变传热传质常压模型  

Phase-transformation Heat Transfer and Mass Transfer Constant-pressure Model for the Drying Process of a Thin-layer Capillary Porous Media Wet-region

作　　者：卢涛[1] 沈胜强[1] 

机构地区：[1]大连理工大学动力工程系,辽宁大连116024

出　　处：《热能动力工程》2003年第1期50-52,77,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：对液相残余饱和度Sir作了一个定义 ,把含湿毛细多孔介质干燥区域分为湿区和干区。建立了以液相饱和度S和温度T为参数的湿区干燥过程相变传热传质常压模型。采用全隐式有限差分方法对模型进行了数值计算。数值解表明 ,模型能很好地预测湿区干燥过程中的液相饱和度S和温度T的变化。With a liquid-phase residual saturation degree Sir being assigned a definition a wet capillary porous media drying-zone is divided into a wet zone and a dry one. On this basis set up was a phase-transformation heat transfer and mass transfer constant-pressure model for the drying process of a wet region with liquid-phase saturation-degree S and temperature T serving as parameters. By using a full-hidden finite difference method a numerical calculation was conducted of the above-cited model. The numerical solution indicates that with the help of the model one can accurately forecast the change of the liquid-phase saturation-degree S and temperature T in the drying process of the wet region.

关 键 词：干燥 常压模型 毛细现象 毛细多孔介质 相变 传热性质 

分 类 号：TK124[动力工程及工程热物理—工程热物理]