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搪玻璃反应釜流场特征的数值模拟 被引量:1

Numerical Simulation on the Characteristics of the Flow Field in Glass-Lined Agitating Reactor
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摘要 为了研究化工行业中常用的搪玻璃反应釜内的流场特征,用UG(Unigraphics)建立实际搅拌釜的三维简化模型,然后导入Gambit中进行网格划分,最后应用Fluent数值模拟,得到了不同转速、流体介质和搅拌形式下反应釜的流场特征并进行对比分析。结果表明:转速改变,流体的速度和压力分布情况相同,仅仅是数值上有所改变,转速的增加使得搪玻璃温度计套表面所受压力增加;不同流体介质下,流体的流场有所差别,粘性较大的流体介质流场速度扩散相对要差,搪玻璃温度计套所受压力较小;对比3种不同搅拌形式(桨式、叶轮式和框式)下的流场发现,叶轮式搅拌器比桨式的流体速度扩散要好,框式搅拌器的流体速度分布最均匀,但是框式搅拌釜流场中搪玻璃温度计套所受压力也最大。 Simplified three-dimensional models of glass-lined agitating reactors, which are commonly usedin the chemical engineering industry, were established by UG (Unigraphics) in this paper. The models werethen imported into Gambit for meshing and finally the Fluent simulation was conducted and analyzed on theflow characteristics in the agitator under different rotating speeds, working fluids and agitating forms. Theresults indicated that the rotating speed had little influence on the distribution of flow speed and pressure,However, the fluid speed and the pressure on the surface of glass-lined jacket of the thermometer increasedwith the rotating speed. Flow field showed different characteristics when the working fluid was changed.The pressure on the surface of thermometer was lower when larger viscous fluid was used because its fielddiffusion rate was relatively poor (diesel vs water). Taking the three different types of mixer(paddle type,impeller type and frame type) into account, the diffusion of the fluid speed for impeller-type mixer wasbetter than that for paddle-type. In addition, it should be noted that the fluid speed distribution was the most uniform for frame-type, nevertheless, the pressure on the surface of thermometer jacket was significantlyhigher than that of the other two types of mixers.
作者 鹿鹏 李伟 郑星文 雍兆铭 Lu Peng;Li Wei;Zhen Xingwen;Yong Zhaoming(Nanjing University of Aeronautics and Astronautics, Jiangsu Province Key Laboratory of Aerospace Power System,Nanjing 210016, China;Jiangsu Liyang Yunlong Equipment Manufacturing Co, Ltd, Liyang 213311, China)
出处 《化学反应工程与工艺》 CAS CSCD 北大核心 2016年第2期97-105,共9页 Chemical Reaction Engineering and Technology
基金 南京航空航天大学研究生创新基地开放基金(kfjj20150202) 中央高校基本科研业务费专项资金(NS2015017) 国家自然科学基金项目(51506087)
关键词 搪玻璃反应釜 数值模拟 流场分析 搅拌形式 温度计套 glass-lined agitating reactor numerical simulation flow field analysis agitating form
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