摘要
本文针对行星式层流搅拌流场及其混合性能分别开展了数值计算和可视化试验研究。数值计算结果表明,在行星式搅拌方案中,搅拌桨周期性掠过搅拌槽内大部分区域,打破了常规中心搅拌方案流场的对称性,减少了流场中的环流区,扩大了流动高速区。此外,增加搅拌桨的自转速度可以加大流场中高、低速区之间的速度相对差值。可视化试验结果表明,行星式层流搅拌方案可以促进不同区域流体的物质交换,混合隔离区面积显著减小,搅拌罐内上、下层流体的混合过程存在差异。增加搅拌桨的自转速度,可以进一步改善流体的混合效果,最终,搅拌罐内的流体可以得到充分混合。
This article conducts numerical simulations on the planetary laminar stirring flow field and visualization experiments on its mixing performance,respectively.The numerical simulation results show that in the planetary stirring scheme,the stirring blade periodically sweeps over most of the area inside the stirring tank,breaking the symmetry of the flow field under conventional central stirring scheme,reducing the circulation area,and expanding the high-velocity flow area.In addition,increasing the rotational speed of the stirring blade can increase the relative difference between the high and low velocity zones in the flow field.The visualization experiment results show that the planetary laminar flow stirring scheme can promote material exchange of fluids in different regions,significantly reduce the area of the mixing isolation zone,and the mixing process of the upper and lower fluids in the stirring tank are different.Increasing the rotational speed of the stirring blade can further improve the mixing effect of the fluid,and ultimately,the fluid in the stirring tank can be fully mixed.
作者
陆金刚
周游游
孙帅
孙靖晨
杨鼎
刘海龙
LU Jingang;ZHOU Youyou;SUN Shuai;SUN Jingchen;YANG Ding;LIU Hailong(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2024年第11期3362-3368,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.12202163)
国家自然科学基金(No.51876086)
江苏省基础研究计划(自然科学基金)(No.BK20220513)
江苏大学高级人才科研启动基金(No.21JDG023)。
关键词
行星式搅拌
层流混合
激光诱导荧光
混合隔离区
混合度
planetary stirring
laminar mixing
laser-induced fluorescence(LIF)
isolated mixing region(IMR)
mixing degree
