【摘要】 针对一种新型T型搅拌器,采用计算流体动力学(CFD)软件FLUENT,利用多重参考系法(MRF)对其的流场进行数值模拟:首先分析对比了T型搅拌器与开启式涡轮搅拌器和圆盘涡轮式搅拌器的湍流强度、搅拌槽内流场特性、时均速度分布和搅拌功率,结果表明T型搅拌器的流场分布较好,能够达到更好的混合效果;通过分析T型搅拌器在不同安装高度下的搅拌特性,确定了指定搅拌槽尺寸情况下最佳安装高度为150mm;最后计算了不同叶片数T型搅拌器的湍流强度分布和搅拌功率,得知槽内搅拌功率随着叶片数的增加而增大,3叶片数的T型搅拌器具有最优的湍流强度分布。本研究对分析和开发类似新型搅拌器有重要的参考意义。更多还原

【Abstract】 The flow field of a new T-shaped stirrer was simulated using the multiple reference frame(MRF)method in the computational fluid dynamics(CFD)software FLUENT.The intensity of turbulence,flow field characteristics,mean velocity distribution,and mixing power of the T-shaped stirrer,open turbine stirrer,and rushton turbine stirrer were analyzed and compared,and the results suggested that the T-shaped stirrer has a better flow field distribution to achieve better mixing effects.The mixing characteristics of T-shaped stirrer with different mounting heights were analyzed,and the best mounting height was obtained as 150mm under the condition of fixed stirred tank size.The turbulence intensity and mixing power of the T-shaped stirrer with different numbers of blades were investigated,which showed that the mixing power increases with the increasing number of blades and the T-shaped stirrer with 3blades has the best turbulence intensity distribution.The research can provide an important basis for the analysis and development of new stirrer.更多还原