CAJ | 학술논문

研究了用于液体除湿的椭圆中空纤维膜管束管间纵向动量与热量传递现象。选择了四边形和三角形排列这两种规则排列管束中的两根纤维管和管间流体为研究对象，建立控制管间纵向流体流动与传热过程的偏微分方程，并采用贴体坐标转换法对控制方程进行有限容积离散与求解，获得了计算单元内的阻力系数和Nusselt数，分析了流道内局部Nusselt数的变化特征以及纤维管排布（三角形和四边形排列）、管径比、椭圆半轴比以及壁面边界条件（等壁温或等热通量边界）的影响。研究结果可为用于液体除湿的椭圆中空纤维膜管束的结构设计和性能评价提供基本理论及数据基础。
연구료용우액체제습적타원중공섬유막관속관간종향동량여열량전체현상。선택료사변형화삼각형배렬저량충규칙배렬관속중적량근섬유관화관간류체위연구대상，건립공제관간종향류체류동여전열과정적편미분방정，병채용첩체좌표전환법대공제방정진행유한용적리산여구해，획득료계산단원내적조력계수화Nusselt수，분석료류도내국부Nusselt수적변화특정이급섬유관배포（삼각형화사변형배렬）、관경비、타원반축비이급벽면변계조건（등벽온혹등열통량변계）적영향。연구결과가위용우액체제습적타원중공섬유막관속적결구설계화성능평개제공기본이론급수거기출。
Axial momentum and heat transfer between an elliptical hollow fiber membrane tube bank (EHFMTB) used for liquid desiccant air dehumidification are studied. Two regular arrangements, in-line and staggered, are considered. Two unit cells consisting of two fibers and the fluid flowing longitudinally between the fibers are selected as the calculation domains. The governing equations for the fluid flow and heat transfer between the EHFMTB are established and solved via a boundary-fitted coordinate transformation method. The friction factor and the Nusselt number in the unit cells are obtained. The variation of local Nusselt number along the tube length is analyzed. The effects of pitch-to-diameters, elliptical semiaxis ratios and wall surface conditions on these data are investigated. The results are useful for performance evaluations of the EHFMTB.