并联细通道夹套内流量分配、流场及阻力特性研究  

Study on flow distribution,flow field and flow resistance in jackets with parallel mini-channels

作　　者：朱礼[1] 冯振飞[1] 何荣伟[1] 林清宇[1] 覃杏珍[1] 覃宇奔[1] 黄祖强[1] 

机构地区：[1]广西大学化学化工学院,广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2016年第3期847-856,共10页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51163002);广西自然科学基金资助项目(2014GXNSFBA118051;2014GXNSFBA118057;2013GXNSFAA019025);“广西特聘专家”专项经费资助项目;广西石化资源加工及过程强化技术重点实验室主任基金(2015Z012);广西大学科研基金资助项目(XJZ130359)

摘　　要：为探究并联弯曲细通道夹套内流体的流量分配、流场分布和阻力特性,用CFD软件对3种型号夹套内流体层流流动特性进行数值研究,分析不同细通道结构尺寸和流体进口流速对夹套内流体的流量分配、流场分布和流动阻力的影响。研究结果表明:细通道截面宽度越小(通道数越多),流量分配不均匀系数越小,流量分配越均匀;细通道内存在稳定的二次流,形式为旋向相反的二涡结构,且弯曲细通道内的流体会偏移靠近通道外壁;进出口压降随着通道截面宽度的减少(通道数增加)而增大。通道截面尺寸为1 mm×3 mm的夹套内流体流量分配均匀性最好,但其进出口压降最大。The characteristics of laminar fluid flowing in 3 different jackets with parallel curved mini-channels are numerically studied with CFD software, in order to explore the mass flow distribution, flow field characteristics and flow resistance characteristics. Influence of different mini-channels sizes on the mass flow distribution, flow field distribution and flow resistance characteristics of different jackets are analyzed. The results show that distribution of mass flow becomes more uniform with the rise of mini-channel numbers or the decrease of the width of mini-channel of jackets; Secondary flow in form of symmetric vortices which rotate to the opposite is observed in curved mini-channels of jackets, besides that the fluid flowing through the curved mini-channels shifts to the outer wall of jackets ; The pressure drop between inlet and outlet increases with the rise of mini-channel numbers or the decrease of the width of mini-channel. For the jacket with cross sectional dimension of 1 mm×3 mm, the mass flow distribution in minichannels is the most uniform, however, the pressure drop between inlet and outlet is the largest.

关 键 词：并联弯曲细通道 夹套 流动特性 流量分配 数值模拟 

分 类 号：TQ021.1[化学工程]