摘要
基于多重参考系法和Realizable k-ε模型,利用Fluent软件对双层CBY桨搅拌槽内不同桨间距下流场进行整体数值模拟,并将模拟结果与文献试验结果进行比较,考察桨间距对流场分布、上下层桨叶区速度及功率消耗的影响。结果表明:随着桨间距的增大,槽内流体流型由"连接流"变为"分散流",与试验结果具有较好的一致性;桨间距对下层桨叶区速度影响较大,对上层桨叶区速度影响不大;随着桨间距的增大,搅拌功率逐渐增加,单位体积功率逐渐降低。
Based on the multiple reference frame method and Realiza ble k-ε model, the whole flow field in a stirred tank with double CBY impellers was numerically simulated using fluent software. The simulation test results were compared with literature. The effects of the blade spacing on the flow field distribution, the lower blade speed and power consumption were examined. The results showed that with the increase of blade spacing, flow pattern from the ＂connecting flow＂ into ＂dispersed flow＂, and the test results have good consistency. The influence of blade spacing to the velocity distributions below the upper impellers was relatively large and the influence of blade spacing to the velocity distributions below the lower impellers was little. With the increase of blade spacing, the stirring power in- creased gradually and the power per unit volumethe decreased.
出处
《食品与机械》
CSCD
北大核心
2016年第1期84-86,共3页
Food and Machinery
关键词
双层CBY桨
流场
功率消耗
CFD
double CBY impellers
flow field
power consumption
CFD
