氨基酸发酵罐内部气液流动特性研究  

Gas-liquid Flow Characteristics Study on the Amino Acid Fermentation Tank

作　　者：胡效东[1] 柳庆磊 刘馥瑜 张德新[1] Hu Xiaodong;Liu Qinglei;Liu Fuyu;Zhang Dexin(Shandong University Of Science and Technology, Qingdao 266590, Chin)

机构地区：[1]山东科技大学,山东青岛266590

出　　处：《系统仿真学报》2018年第5期1988-1996,共9页Journal of System Simulation

基　　金：山东省自然科学基金(ZR2014EEM018)

摘　　要：基于Euler-Euler双流体模型和群体平衡模型,应用多重参考坐标系(MRF)方法,运用Fluent分析发酵罐内由圆盘涡轮式搅拌器和翼型轴流式的三层搅拌器内部的流体特性,计算发酵罐内部的氧气气含率及气泡大小。结果表明:上两层搅拌器产生轴向流动,最下层搅拌器产生径向流动,相互作用形成循环流场。氧气分布比较均匀,在搅拌轴和换热管附近有氧气集中的现象;罐内部的整体气含率为2.22%,模拟计算得到发酵罐的搅拌功率为117.81 k W。采用计算流体动力学方法对发酵罐的研究结果具有工业应用价值,而在研究过程中用到的理论方法在解决问题时具有一定的理论意义。Based on the Euler - Euler two-fluid model and population balance model, using MRF （multiple reference frame） method, the flow fieM of the rushton turbine stirred reactor and airfoil axial flow stirred reactor in fermentation tank is analyzed by Fluent. The information of the oxygen content and the size of bubble in the tank is obtained. The simulation results show that the axial flow produced by the airfoil axial flow stirred reactor and the radial flow produced by the rushton turbine stirred reactor interact with each other. The oxygen distribution is relatively uniform. There is an oxygen concentration near the mixing shaft and heat exchanger tube. The overall gas holdup is reached to 2.22%. The stirring power of the fermentation tank calculated by the simulation is 117.81 kW. The results of computational fluid dynamics （CFD） on fermentors are of industrial application value. The theoretical method used in the research has certain theoretical significance in solving the problems.

关 键 词：氨基酸发酵 欧拉模型 多重参考坐标系 气含率 群体平衡模型 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]