摘要
在流体中加入高分子聚合物和采用壁面微沟槽结构对管路的减阻效果具有实际工程应用意义。通过数值模拟技术,分别模拟不同浓度的聚丙烯酰胺(Polyacrylamide, PAM)溶液在微沟槽管路中的减阻效果,并探究其减阻机理。结果表明:当使用质量浓度为15、30和60 mg/L的PAM溶液时,其最大减阻率分别为23.95%、27.60%和30.48%;浓度较高的溶液在充分发展阶段的壁面切应力较小,减阻率越高的溶液近壁面处涡量越小也越平稳,两种方式共同作用的减阻效果要优于单一方式减阻。
Adding polymers to fluids and employing micro-grooved surface structures can reduce pipe resistance,offering practical engineering applications.This study exerts numerical simulation to evaluate the drag reduction effects of Polyacrylamide(PMA)at different concentrations in micro-grooved pipelines and explores the underlying mechanisms.The results show that when PAM solution at concentration of 15,30 and 60 mg/L,the maximum drag reduction rate is 23.95%,27.60%and 30.48%,respectively.Solutions with higher concentration exhibit smaller wall shear stress during the full development stage,and those with higher drag reduction rates have reduced and more stable vorticity near the wall.The combined approach of using polymer solutions and micro-grooved structures is better than either method alone.
作者
张浩
李政恒
李茂林
赵智超
邵玉彬
ZHANG Hao;LI Zhengheng;LI Maolin;ZHAO Zhichao;SHAO Yubin(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Collaborative Innovation Center of Green Building,Jinan 250101,China;Zaozhuang Shengli Canal Management Service Center,Zaozhuang 277317,China)
出处
《山东建筑大学学报》
2024年第6期55-62,共8页
Journal of Shandong Jianzhu University
基金
山东省专业学位研究生教学案例库项目(SDYAL20162)
山东省研究生优质课程建设项目(SDYKC19117)。
关键词
减阻技术
高分子聚合物
微沟槽
drag reduction technology
polymer
microgroove
作者简介
通信作者:张浩(1976-),男,教授,博士,主要从事流动减阻机理及技术、非牛顿幂律流体边界层、复杂体系流动换热等方面的研究。E-mail:qdzhanghao@126.com。
