Abstract: Spiral separator has the characteristics of simple structure, light weight and wellseparated effect, which becomes one of the commonest centrifugal separator currently. CFD method was used to simulate wateroil separation in spiral pipe under the condition of a variety of entrance velocities and cross section shapes, and obtained a wateroil separation result that for a spiral pipe with circular cross section shape, the separation effect became sharper as the velocity increased, and too fast or too slow velocity both impacted the effect. When they were equal cross section areas, circular had a better effect than laddershaped and square cross sections. Based on the numerical simulation, the result provided a certain theoretical basis for spiral pipe technology.

Key words: Flow velocity , Section shape , Spiral pipe ,  Wateroil separation ,  Numerical simulation

摘要： 螺旋管分离器具有结构简单、重量轻、分离效果好等特点,是目前最常用的一种离心分离器。对不同
入口速度下的螺旋管和具有不同截面形状的螺旋管内油水分离进行数值模拟,得出了油水分离规律:对圆形截面螺
旋管,随着流速的增加分离效果变得明显,过大或过小的流速都影响分离效果;在截面面积相同的情况下,圆形截面
的螺旋管的油水分离效果比方形和梯形截面的螺旋管明显。研究结果可为螺旋管技术的改进提供一定的理论基
础。

关键词: 流速 , 截面形状 , 螺旋管 , 油水分离 , 数值模拟