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双层双折叶三斜叶圆盘涡轮桨釜内流场特性研究

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通过计算流体力学(CFD)对双层双折叶三斜叶圆盘涡轮桨搅拌釜内的流场特性进行了模拟研究,分析了组合桨的转速N、离底距离C1及桨间距C2的变化对釜内流场的影响,利用粒子图像测速(PIV)技术对模拟结果进行了验证.研究结果表明:当转速N=100rpm时,壁面附近的低速区域几乎消失,釜内流体整体速度得到提升及流场速度分布较好.离底距的增大会导致釜内流场的高速区上移,当离底距C1=0.28h时,近液面区域流体流速改善较明显,釜内流场速度分布较为合理.桨间距的提升能改变上下桨叶的配合效果,当桨间距C2=0.25h时釜内混合效果最佳,近液面区域流体流速明显提高,釜内流体整体流速较高.研究结果可为双折叶三斜叶圆盘涡轮桨在实际工程应用中提供参考.
Study on Flow Field Characteristics of Double Two-Hinge Three-Pitched Disc Turbine Rotating Impellers
The flow field in a stirred tank equipped with the double two-hinge three-pitched disc turbine rotating impellers was simulated by computational fluid dynamics(CFD).The effects of the rotational speed of the impellers(N),installation height of impellers C1 and impeller pitch C2 on the flow field in the stirred tanks were analyzed,and the simulation results were validated by PIV experiments.The result shows that when the rotating speed N=100rpm,the low-velocity area near the inner wall almost disappears,the overall velocity of the fluid in the tank is improved and the velocity distribution of the flow field is optimal.The increase of distances from the bottom will cause the high-velocity area of the flow field in the stirred tank moves up.When the distances from the bottom C1=0.28h,improvement of the fluid velocity in the area near the liquid surface is significant,and the velocity distribution of the flow field in the stirred tank is reasonable.The increase of the impeller spacing can alter the interaction of the upper and lower impellers.The mixing effect in the tank is the best when the impeller spacing C2=0.25h,the flow rate of fluid increased significantly in the area near the liquid surface,and the overall velocity of fluid in the stirred tank is fast.The research results can provide reference for the practical engineering application of double two-hinge three-pitched disc turbine rotating impellers.

double two-hinge three-pitched disc turbine rotating impellerCFD numerical simulationPIVflow field

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江苏省特种设备安全监督检验研究院/国家化工设备质量检验检测中心(江苏),苏州 215600

双层双折叶三斜叶圆盘涡轮桨 CFD数值模拟 PIV 流场

2024

中国化工装备
中国化工装备协会

中国化工装备

影响因子:0.216
ISSN:1671-0525
年,卷(期):2024.26(2)
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