2斜叶-框式组合桨釜内流场实验研究  

Experimental Investigation of Flow Dynamics in Stirred Tank with Two-Pitched Blade-Frame Type Combined Impellers

作　　者：高晓斌 包健[2] 刘龙炜 杨其洲 周勇军[1] GAO Xiaobin;BAO Jian;LIU Longwei;YANG Qizhou;ZHOU Yongjun(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China;National Quality Supervision&Inspection Center of Chemical Equipment,Special Equipment Safety Supervision Inspection Institute of Jiangsu Province,Suzhou,Jiangsu 215600,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816 [2]江苏省特种设备安全监督检验研究院国家化工设备质量监督检验中心,江苏苏州215600

出　　处：《轻工机械》2023年第5期38-43,共6页Light Industry Machinery

基　　金：国家自然科学基金(52175171)。

摘　　要：为将2斜叶-框式组合桨高效应用于实际工程,课题组以不同质量分数的甘油-水溶液为搅拌介质,通过粒子图像测速技术(PIV)对该改进型框式组合桨搅拌釜内的流动特性进行实验研究,分析了桨间距、顶桨直径和搅拌介质黏度变化对釜内流场产生的影响。研究结果表明:随着桨间距的增加,2桨叶间流体的循环效果先增强后减弱,桨间距C_(2)=0.52H时2桨叶配合最佳;顶桨直径D_(1)=250 mm时形成2个涡合能力较好的涡流,此时釜内流体的整体混合情况较好;随着黏度的增大,2桨叶间扰动增强,整个搅拌釜内速度分布变得更加均匀,表明改进型框式组合桨更适用于黏度较高的溶液中。研究结果可为2斜叶-框式组合桨在聚酯合成工业实际工程生产中提供相关参考。In order to ffciently apply two-pitched blade-frame type combined impellers in practical engineering,the flow characteristics of glycerol-water solution of diferent mass fractions in the stirred lank with improved frame lype combined impellers were experimentally studied by using particle image velocimetry(PIV).The ffects on the flow field arising from the distance between two impellers,the diameter of the top impeller as well as the viscosity of stiring medium were investigated.The experimental results show that the circulating effect of fluid between two blades increases first and then decreases with the increase of the impeller spacing.When the impeller spacing C_(2)=0.52H,the two blades cooperated best.The two vortexes of converging capacity are formed when the top impeller diameter D_(1)=250 mm,and the overall mixing of the fluid in the tank is better.With the increase of the viscosity,the disturbance between the two blades increases,and the velocity distribution in the whole stirred tank becomes more uniform,suggesting that the improved frame type combination impeller is more suitable for solutions with higher viscosity.The research results provide a reference for the application of the two-pitched blade-frame type combined impellers in polyester synthetic industry practical engineering.

关 键 词：2斜叶-框式组合桨 粒子图像测速 流场特性 桨间距 

分 类 号：TQ027[化学工程] TH164[机械工程—机械制造及自动化]