可溶性聚合物对90°弯管内流动特性的影响规律分析  

Numerical Analysis of the Effect of Soluble Polymer on the Flow Characteristics in 90°Elbow Pipe

作　　者：徐顺 刘琦 王俊新[2] 张益诚[2] 贺啸秋 熊永亮 XU Shun;LIU Qi;WANG Jun-xin;ZHANG Yi-cheng;HE Xiao-qiu;XIONG Yong-liang(School of Aerospace Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;China Ship Development and Design Center,Wuhan 430064,China)

机构地区：[1]华中科技大学航空航天学院,武汉430074 [2]中国舰船研究设计中心,武汉430064

出　　处：《船海工程》2022年第5期64-67,73,共5页Ship & Ocean Engineering

基　　金：国家自然科学基金(11872187,12072125);青年科学基金(52109104);湖北省博士后创新研究(0106123007)。

摘　　要：考虑到聚合物的添加会显著改变弯管内的湍流结构,且影响出口直管段流场均匀性的特性,基于直接数值模拟方法分别对魏森贝格数为0和2时的90°弯管内部流动特性进行分析,结果表明,数值模拟得到的弯管内部流速分布与试验测量规律一致,验证了直接数值模拟方法的可靠性,此外,聚合物的添加会促进弯管内迪恩涡的发展,加剧弯管内部的二次流动,使得同一截平面处弯管外侧的最大轴向流速要高于未添加聚合物时的工况;并且聚合物的添加使得迪恩涡逐渐向出口直管段延伸,会降低出口直管段的均匀度。In the view of the fact that the addition of soluble polymer will significantly change the turbulent structure in the 90°elbow pipe and affect the flow uniformity of the outlet pipe,the direct numerical simulation method were used to analyze the internal flow characteristics of the 90°elbow pipe in corresponding to the W=0 and W=2.The results showed that the velocity of the internal flow obtained by the numerical calculation in the 90°elbow pipe fits with the experimental law,verifying the reliability of the used numerical method.In addition,the addition of soluble polymer will promote the development of the Dean vortex,which will make the secondary flow of the 90°elbow pipe more obvious.The maximum axial flow velocity outside the bend at the same cross-sectional plane is higher than that without adding polymer.At the same time,the addition of soluble polymer will reduce the uniformity of the outlet pipe.

关 键 词：二次流 聚合物 粘弹性流体 均匀度 

分 类 号：U664.84[交通运输工程—船舶及航道工程]