[1]潘跃跃,杨其洲,徐阳,等.双层改进型推进式搅拌桨桨间距对搅拌槽内流场的影响[J].石油化工设备,2024,53(06):8-14.[doi:10.3969/j.issn.1000-7466.2024.06.002]
　PAN Yue-yue,YANG Qi-zhou,XU Yang,et al.Effect of the Impeller Pitch of Double-layer Improved Propeller on Flow Field in the Stirred Tanks[J].Petro-Chemical Equipment,2024,53(06):8-14.[doi:10.3969/j.issn.1000-7466.2024.06.002]
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双层改进型推进式搅拌桨桨间距对搅拌槽内流场的影响()
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石油化工设备[ISSN:1000-7466/CN:62-1078/TQ]

卷:
53
期数:
2024年06期
页码:
8-14
栏目:
试验研究
出版日期:
2024-11-15

文章信息/Info

Title:
Effect of the Impeller Pitch of Double-layer Improved Propeller on Flow Field in the Stirred Tanks
文章编号:
1000-7466(2024)06-0008-07
作者:
潘跃跃; 杨其洲; 徐阳; 周勇军
南京工业大学 机械与动力工程学院，江苏 南京 211816
Author(s):
PAN Yue-yue; YANG Qi-zhou; XU Yang; ZHOU Yong-ju
College of Mechanical and Power Engineering，Nanjing Tech University，Nanjing 211816，China
关键词:
推进式搅拌桨; 搅拌槽; 桨间距; 粒子图像测速; 大涡模拟; 流场
Keywords:
propeller impeller; stirred tank; impeller pitch; particle image velocimetry; large eddy simulation; flow field
分类号:
TQ027
DOI:
10.3969/j.issn.1000-7466.2024.06.002
文献标志码:
A
摘要:
采用粒子图像测速技术对不同桨间距C2下双层改进型推进式搅拌桨槽内流场特性进行实验研究，并分别采用大涡模拟模型、标准k-ε模型以及RNGk-ε模型对搅拌槽内流场进行模拟预测。研究结果表明，桨间距C2对搅拌槽内流型及速度分布有较大影响。当C2=0.23H（H为液位高度）时，受上桨排出和卷吸作用的影响，下桨区域的旋涡无法成型，搅拌槽内物料混合效果不佳；当C2=0.26H时，上桨叶区的高速区域较C2=0.23H时增大了20%左右，下桨叶区高速区域增大了近25%，下桨叶区开始形成区域自循环；当C2增大到0.29H 时，两桨间逐渐出现低速旋涡和流动死区，同时混合效率降低。对比r/T（r/T为周向距离比）=0.4处的无因次化速度分布，发现采用大涡模拟模型得到的模拟结果与搅拌槽内流场的实验结果更接近。研究结果可为双层改进型推进式搅拌桨的实际应用提供参考。
Abstract:
Particle image velocimetry was used to experimentally study the characteristics of the flow field in the stirred tank at different impeller pitches C2，and the large eddy simulation model，standard k-ε model and RNG k-ε model were used to simulate the flow field in the tank, respectively. The research results show that the impeller pitch has a great influence on the flow streamlines and velocity distribution in the tank. When the impeller pitch C2=0.23H（H represents the liquid level height），affected by the upper impeller discharge and entrainment effects，the vortex of the lower impeller zone cannot be formed，and the mixing effect of materials in the tank would be poor; When the impeller pitch C2=0.26H，compared with C2=0.23H，the high-speed zone in the upper impeller zone increases by about 20%，the high-speed zone in the lower impeller zone increases by nearly 25%，and the lower impeller zone begins to form regional self-circulation. When the impeller pitch increases to C2=0.29H，low-speed vortices and flow dead zone gradually appear between two propellers，meanwhile，the mixing efficiency decreases. By comparing the position at r/T（ r/T represents the circumferential distance ratio）=0.4，it was found that the simulation results using the large vortex simulation model are closer to the experimental results of the flow field in the stirred tank. The research results provide a reference for the practical application of this stirring impeller.

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备注/Memo

备注/Memo:
收稿日期： 2024-05-31
基金项目：国家自然科学基金资助项目（52175171）
作者简介：潘跃跃（1999-），男，安徽阜阳人，在读硕士研究生，研究方向为搅拌装备开发。电话：18712527726，E-mail：202261207111@njtech.edu.cn。
通信作者：周勇军（1969-），男，江苏南京人，硕士，教授，研究方向为流体机械技术及装备研发、过程装备故障诊断评价与节能技术等。E-mail：zhouyj@njtech.edu.cn。
更新日期/Last Update: 2024-11-15