螺旋叶片轴向排列结构强化管内高黏流体流动特性研究  

Analysis of Flow Characteristics of High Viscosity Fluid in Tube with Different Twist Blade Arrangements

作　　者：王丰[1] 禹言芳[1] 吴剑华[1] 孟辉波[1] 

机构地区：[1]沈阳化工大学能源与动力工程学院辽宁省高效化工混合技术重点实验室,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2015年第4期329-335,共7页Journal of Shenyang University of Chemical Technology

基　　金：国家自然科学基金(21106086;21306115;21476142);辽宁省高等学校优秀人才支持计划(LR2015051);辽宁省教育厅科研项目计划(L2013164);辽宁省博士启动资金项目(20131090)

摘　　要：利用计算流体力学方法探讨两种螺旋叶片轴向排列方式对其内部高黏度流体流场的影响,提取两种结构的速度场和压力场分析发现,三维速度场均存在着明显的周期性规律.KSM(Kenics type)叶片对流体的切割分流和改变自旋方向在每个叶片的两端产生的压力降为定值,并且随着雷诺数的增加而线性增加.在两种叶片结构的同侧不同端点位置处存在着压力峰值区域诱导了径向二次流的产生.对速度场和压力场的整体协同性分析发现KSM和SSM对应的协同角随雷诺数的增加而下降,SSM内速度场与压力场的整体协同性优于KSM.The flow fields of high viscosity fluid in the static mixers with two arrangements of twist leaves were studied using CFD method. The analysis of velocity and pressure shows that the three-dimen-sional velocity fields of two structures are periodic. The pressure drop of each leaf caused by flow division and flow reversal is constant and increases linearly with increasing Re. There exist peak values of pressure in the different ends of the same side in leaves. The pressure gradient is beneficial to the formation of sec-ondary flow. The research on the global synergy of velocity and pressure fields reveals that the field syner-gy angles of two structures decrease with increasing Re. The global synergy of velocity and pressure fields in SSM is better than that in KSM.

关 键 词：数值模拟 速度场 压力场 场协同 协同角 

分 类 号：TQ051.7[化学工程]