双搅拌高效澄清萃取槽混合室均混时间的数值模拟

利用CFD软件FLUENT120，采用Realizablek-ε湍流模型、Eulerian多相流模型及Morsi Alexander相间曳力系数模型，使用滑移网格法处理桨叶的旋转区域，对新型萃取槽混合室内的液-液体系的均混时间以及搅拌功率进行数值模拟.结果表明:随着搅拌转速的增大，搅拌桨消耗的功率增加，水油两相的均混时间减小.搅拌桨转速达到400r/min后，增大转速则搅拌功率继续增大，但对液-液两相均匀混合时间的影响不大.

Numerical Simulation on Mixing Time of High Efficient Clarification and Extraction Tank with Double Stirring

Mixing time and stirring power in the mixing room of a new type extraction tank were simulated by CFD software FLUENT 120， in which the realizable k-ε turbulence model and the Eulerian multiphase flow model were selected， the interphase drag coefficient was determined by using Morsi Alexander model， the sliding mesh method was used to process the rotation area of the blade. The results showed that with the increasing of agitation speed， the power consumption increases and the mixing time of liquid liquid system is reduced. When stirring speed was over 400r/min， the power increases continually and the mixing time does not change obviously.