双层折流板三弧叶桨釜内流场的特性研究  

Characteristics of Flow Field in a Double-layer Three-arc Blade Propeller Kettle with Baffle

作　　者：卢贤俊 许家宝 徐子强 陶兰兰[2] 周勇军[1] LU Xianjun;XU Jiabao;XU Ziqiang;TAO Lanlan;ZHOU Yongjun(College 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 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：《湿法冶金》2025年第2期256-263,共8页Hydrometallurgy of China

基　　金：国家自然科学基金资助项目(52175171)。

摘　　要：通过粒子图像测速技术(PIV)研究了双层折流板三弧叶组合桨搅拌槽内转速N、离底距C_(1)及桨间距C_(2)的变化对流场产生的影响,并对双层折流板三弧叶桨和双层无折流板三弧叶桨的釜内流场特性进行了模拟对比。结果表明:当N=110 r/min时,釜内流场速度分布相对均匀,釜内高速区集中在桨叶附近;桨间距的提升会影响上下桨叶之间的相互配合效果;当C_(2)=0.27 h(h为搅拌釜液面高度)时,桨叶之间连接流稳定,釜内的整体混合能力显著增强;C 1对近液面区域及釜底区域的混合效果影响较大,当C_(1)=0.29 h时,釜内低速区面积大幅减少;双层折流板三弧叶桨的折流板限制了其径向推流能力,但轴向推流能力得到了显著增强。研究结果可为双层折流板三弧叶桨在实际工业中的应用提供参考。The effects of the changes of speed(N),distance(C_(1))from the bottom and pitch(C_(2))of the double-layer baffle three-arc blade composite paddle on the flow field in the stirring tank using particle image velocimetry(PIV)were studied.The flow field characteristics of the double-layer baffle three-arc blade propeller and the double-layer baffle-free three-arc blade propeller were simulated and compared.The results show that when the rotation speed N=110 r/min,the velocity distribution of the flow field in the kettle is relatively uniform,and the high-speed zone in the kettle is concentrated near the propellers.When C_(2)=0.27 h(h is the liquid level height of the stirred tank),the connection flow between the propellers is stable,and the overall mixing capacity in the kettle is significantly enhanced.When C_(1)=0.29 h,the area of the low-velocity zone in the kettle is greatly reduced.The baffle of the double-layer baffle three-arc blade propeller limits its radial pushing capacity,but the axial pushing capacity is significantly enhanced.The research results can provide a reference for the application of double-layer baffle three-arc blade propeller in practical industry.

关 键 词：搅拌槽 双层折流板三弧叶桨 搅拌釜 PIV CFD 

分 类 号：TF803.2[冶金工程—有色金属冶金] TQ051.72[化学工程]