摘要
基于CFD数值模拟技术,对新型撞击流反应器内管内径进行了优化。该反应器由同轴的内外管构成,其中外管固定于机架,内管由锥齿轮带动做旋转运动,内管管壁均匀开设多排微孔,同轴的内外管之间构成环形微反应区。内管内径尺寸直接影响着反应器内部的压力和湍动能的分布,从而决定了微反应区内两种反应液的混合程度,因此它是反应器的一个重要设计参数。本工作系统研究了不同内管内径对环形微反应区内流场结构的影响,结果表明:内管内径为2mm时,在各排微孔处产生的撞击束均获得了较高的能量,微孔喷射速度大,且其喷射速度和湍动能自上而下逐渐增加,反应液在停留时间较短的反应器的底部,具有更好的撞击效果,有利于反应液的充分混合与反应。
In this paper,the inner pipe diameter of the new-style impinging stream reactor was optimized by CFD numerical simulation technology.The reactor was consists of the coaxial inside tube and outside tube,in which,the outer tube is fixed on the rack,and the rotation of the inside tube is driven by bevel gear.The multiple-rows microporous are uniformly opened on the inside tube wall,and looping micro-reaction zone was formed among the coaxial inside and outside tube.The size of the inner pipe diameter directly affect the pressureand turbulent kinetic energy distribution of the reaction liquid in looping micro-reaction zone,and then determine the mixed degree of two kinds of reaction liquid.So the size of the inner pipe diameter is important parameter in design of the reactor.In this paper,the influence of the difference size tube diameter on the flow field structure in the reactor is studied.The results show that high turbulent kinetic energy and the jet velocity were obtained at each microporous,when the inside tube diameter is 2 mm.The jet velocity and turbulent kinetic energy increase gradually from top to bottom,leading to the reaction liquid with short residence time in reaction zone of the reactor bottom has batter impact effect.It is more beneficial to the mixing and reaction of the reaction liquid.
出处
《青岛科技大学学报（自然科学版）》
CAS
2018年第2期105-111,共7页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家自然科学基金项目(51672144
51572137
51502149
51272117)
山东省自然科学基金项目(ZR2016EMB25)
泰山学者特聘专家计划项目(ts201511034)
关键词
旋转式同轴撞击流反应器
内管内径
CFD数值模拟
有限元分析
rotating coaxial impinging stream reactor
the inner pipe diameter
CFD numerical simulation
finite element analysis
