利用计算流体力学技术分析啤酒发酵罐构型对温度和流动的影响  

Analysis of temperature and convection flow in cylindroconical fermenters with different geometries by computational fluid dynamics

作　　者：刘瑞赛 安家彦[1] 董文勇 王越[1] 

机构地区：[1]大连工业大学生物工程学院 [2]大连市第21中学,辽宁大连116000

出　　处：《食品与发酵工业》2016年第9期52-57,共6页Food and Fermentation Industries

摘　　要：为了考查啤酒发酵罐的几何构型对发酵液温度和流动状态的影响,利用计算流体力学（computational fluid dynamics,CFD）模拟技术对啤酒发酵罐进行了后发酵降温过程的数值模拟,研究了在不同几何构型的发酵罐中发酵液的温度分布和速度分布情况。结果表明,啤酒发酵罐高径比在3∶1~4∶1,有效容积在500 m3左右时降温效果较好,并且除了高径比为2∶1的350 m3发酵罐内发酵液呈现一个整体的大环流外,其他罐内发酵液均以局部小环流状态存在。In order to investigate the influence of geometries of beer fermenters on fermentation broth,Computational fluid dynamics（ CFD） technology was used for evaluating temperature distributions and velocity distributions of fermentation broth in fermenters with different geometries during the subcooling process. Results showed that fermenters with height∶ diameter ratio of 3∶ 1-4 ∶ 1 and effective volume of about 500 m3 had better effect on heat transfer.Except there was a whole cycle of convection in the fermenter with volume of 350 m3 and H∶ D ratio of 2∶ 1,the fermentation broth in other fermenters existed in a state of local small vortices.

关 键 词：圆柱锥底发酵罐 几何构型 计算流体力学 啤酒发酵 降温 

分 类 号：TS262.5[轻工技术与工程—发酵工程]