摘要
通过计算流体力学方法模拟研究了高黏条件下中国结式静态混合器(CKSM)的流动和传热特性。实验结果表明,低Re下,CKSM规范化了管道内流场结构,加强了流体的径向混合,削弱了层流边界层;CKSM的结构效应使管内摩擦系数较空管增加了3.4倍,Nu提高了1.9~3.2倍,综合传热评价指标(PEC)增加了1.4~1.5倍;当CKSM管内伴热时,静态混合器管壁处的Nu增加了2.7~4.0倍,PEC提高1.9~2.3倍。
Computational fluid dynamic simulation was used to study the flow characteristics and heat transfer performance,while the mold-up experiment correspondingly verifies the reliability of the simulation results.The result shows that Chinese-knot type static mixer(CKSM)can provide a structured flow field for viscous fluids with enhanced radial mixing and weakened boundary layer.The friction coefficient of CKSM is 3.4 times higher than the empty tube.The Nu of CKSM near the wall is 1.9-3.2 times and the performance efficient coefficient(PEC)is 1.4-1.5 times higher than the empty tube.Furthermore,when the inside of CKSM is full ofheating media,the Nu and PEC value can further increase to 2.7-4.0 times and 1.9-2.7 times higher than the empty tube,respectively.
作者
孙达
仇枭逸
奚桢浩
赵玲
彭冲
施龙生
Sun Da;Qiu Xiaoyi;Xi Zhenhao;Zhao Ling;Peng Chong;Shi Longsheng(State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;Engineering Research Center of Process System Engineering,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China;Key Laboratory of Oil and Gas Fine Chemicals,Ministry of Education,Xinjiang University,Urumqi Xinjiang 830046,China;Qidong Julong Petrochemical Equipment Co.,Ltd.,Qidong Jiangsu 226200,China)
出处
《石油化工》
CAS
CSCD
北大核心
2020年第10期960-966,共7页
Petrochemical Technology
基金
十三五国家重点研发计划项目(2016YFB0302702)
中央高校基本科研业务费专项资金项目(22221817014,22221818014)。
关键词
静态混合器
计算流体力学
传热
边界层
黏性流体
Chinese-knot static mixer
computational fluid dynamic
heat transfer
boundary layer
viscous fluid
