Abstract: As a new type of high⁃efficiency mixing equipment, static mixers are widely used in industrial production due to their good mixing effect and simple operation. In this paper, the SK type static mixer was introduced into the crude oil storage tank to solve the problem of uneven distribution of crude oil density. The three⁃dimensional incompressible flow field was numerically simulated by FLUENT. The Eulerian multiphase flow model was used to simulate the velocity field, concentration field, temperature field and pressure field of the fluid in the static mixer. The results show that: under the action of the spiral blades of the static mixer, the crude oil moves cyclically along the opposite direction of the blade and changes periodically. Through the cutting, shearing and rotating action of the crude oil, the oil is almost completely mixed at the exit,which shows that SK static mixer has better mixing effect and less pressure loss and can reduce the energy consumption cost.

Key words: SK type static mixer, FLUENT, Crude oil storage tank, Mixed characteristics, Numerical simulation

摘要： 静态混合器作为一种新型高效的混合设备，因具有混合效果好、操作简单等优点而被广泛应用于工业生产。将SK 型静态混合器引入原油储罐中，以解决原油密度分布不均匀的问题。利用FLUENT软件，对其三维不可压缩流场进行了数值模拟；采用Eulerian多相流模型，模拟了SK型静态混合器中流体的速度场、密度场、温度场以及压力场。结果表明，在SK型静态混合器的螺旋叶片作用下，原油沿着叶片做方向相反的螺旋运动并呈周期性变化；通过叶片的切割、剪切和旋转作用，原油在出口处几乎混合完全，说明SK型静态混合器具有较好的混合效果，且压力损失较小，可降低能耗成本。

关键词: SK型静态混合器, 　FLUENT, 　原油储罐, 　混合特性, 　数值模拟