液液旋流分离器的数值模拟研究进展

旋流分离器是近年来发展非常迅速的液液分离设备，其主要优点是高效、节能、占地面积少且成本低，工业应用广泛。数值模拟是液液旋流分离器研发与研究的重要手段。本工作系统地介绍了目前液液旋流分离器在数值模拟中的研究进展，详细地分析了数值模拟过程中旋流分离器模型的选择、几何结构和操作参数的改变对分离效率和流场的影响及最终的评价指标，并对几何结构和操作参数改变提出了见解，对液滴破碎和聚并、旋涡的数值模拟及开发新的公式评价分离效率进行了展望。

Progress in numerical simulation of liquid-liquid cyclone separator

The cyclone separator is a liquid-liquid separation device that has been developed very rapidly in recent years. The main advantages of cyclone separators are high efficiency, energy saving, economic space occupation, and low cost. It is widely used in such industries as mineral processing and metallurgy, sewage treatment, food, paper making, and petroleum chemistry. Therefore, it is particularly important to study the relevant characteristics of the cyclone separator. Besides, numerical simulation is an important method for the development and research of liquid-liquid cyclone separators. This work systematically introduced the research progress of the numerical simulation of liquid-liquid cyclone separators, where the effects of the selection of cyclone separator model, the variation of geometric structure (including the inlet, the cone section, the overflow pipe, the guide vane and the cylindrical section) and operating parameters (including the split ratio, the total flow and the feed ratio) on the separation efficiency as well as the flow field were analyzed, and the final evaluation indices (including the separation efficiency and the pressure drop) were also proposed. Besides, some opinions on the change of geometrical structure and operating parameters influencing the separation efficiency and the pressure drop were provided, and the numerical simulation of the vortex and the droplet breaking and coalescing, as well as the development of new separation efficiency evaluation formulas were prospected. New ideas for the following up research workers of the cyclone separator were provided.