文档介绍：振荡流混台反应器停留时问分布的数值摸拟研咒2Q丝:姓摘要 f振荡流混合反应器(Oscillatory Flow Reactor,以下简称为OFR)以其优越的 t —性育害弋良好的质量传递、热量传递,工艺过程容易控制等)正引起人们的广泛关注。以各种不同的方法对它的各种性能的研究已经取得了一些很有价值的成果。作为一种性能优良的新型的反应设备,它可以应用到化学工程等很多领域,如粒、/ 子的悬浮与分离、絮凝工艺、化工反应器、过滤、生物科学、医药科学等。y , (RTD)进行模拟研究. 探讨振荡流混合反应器重要操作参数——振荡雷诺数Reo对RTD的影响。本文的工作主要集中研究在层流流态下,一定净流量的三维OFR流场中示踪粒子停留时间的分布情况,通过后处理获得不同反应器类型(八腔室OFR、四腔室OFR、基本管式反应器、带挡板管式反应器)、不同Reo下RTD曲线, 并根据曲线的形状进行定量的分析,建立反应器内混合模式的唯象模型。本文首次实现了三维OFR流场中RTD的模拟,并成功地获得了1000个示踪粒子的RTD曲线。同时针对八腔室和四腔室情况,分别采用了八个和四个带级间返混的串联全混釜唯象模型进行了比较研究,通过对级问返混比的优化调整,对应的唯象模型能够较好地描述OFR的RTD特性,而可调整模型参数——级间返混比的数值随Reo和腔室数目的改变发生显著变化。本文的工作为进一步的研究打下了良好基础。在OFR流场RTD数值模拟的基础上可以进一步进行OFR中化学反应过程的数值模拟研究。关键字:,振荡流混合反应器~振荡流混合反应器停留时间分布的数值模拟研究 2勉2:姓 ABSTRACT Great interest hasbeeninput on Oscillatory Flow Reactors(OFR),which has good performance inmomentum。heat,and mass transferprocesses in an OFR Call be well controlled by changing the frequency and amplitude offluid potential applications ofOFR inchemical engineering have been explored,such as particle suspension andseparation,fleeculation,filter,chemical reactors,separation processes inbioengineering andpharmaceutical engineering. In mis mothod Was used to simulate the Residence Time Distribution偶TD)in influence of some main factors on RTD,such as oscillatory Reynolds number(Reo),number of cells in an OFR,flow rate, WeTe studied. Our work focused putating theresidence time oftracing particles in three—dimensional laminar flow with flow rate in an RTD curvcs indifferentReo were obtained throu【ghpost-treatment forfour-cell,eight-cell 0FRS andbaffledand on theshape RTD curves。a kindofphenomenological models ofmixing partems was builtup. It’Sthefirst time toimplememt thesimulation ofRTD inthree·dimensional OFR flow field,and toobtain RTD Curves with 1000 tracing tothe results with4and 8cells,thephenomenological models of4and 8CSTRs inseries within