This study aimed to investigate the separation performance of a cyclone separator after reshaping its cylindrical body by installing the helical triangular fins. A numerical simulation based on Fluent was adopted to perform an orthogonal test to optimise the structure of the cyclone separator with helical triangular fins. Three structural parameters of the helical triangular fins were selected as optimisation variables: base width, fin size, and fin pitch, and their influences on the evaluation indices of the cut-off diameter were investigated. The optimal combination scheme was determined by range analysis, and the cyclone separator performances before and after optimisation were compared and analysed. The significant influence of the structural parameters on the cut-off diameter was in descending order as the fin pitch, fin size, and base width. For particles with diameter of 0.1, 0.5, 1, 2, and 3 μm, the separation efficiency of the cyclone separator with optimized helical triangular fins increased by 7.4 %, 15.9 %, 20.1 %, 10.9 % and 14.8 % respectively. Moreover, the cut-off diameter of the finned cyclone separator is reduced by 30.7 %, while the pressure drop is only increased by 6.6 %. The short circuit flow and back-mixing were alleviated, thereby considerably enhancing the stability of the flow field. Therefore, the finned cyclone separator was found to play a critical role in increasing the separation of fine particulate matter.

本研究旨在研究旋风分离器在通过安装螺旋三角翅片对其圆柱体进行整形后的分离性能。采用基于Fluent的数值模拟进行正交试验优化螺旋三角翅片旋风分离器的结构。选取螺旋三角翅片的三个结构参数作为优化变量：基宽、翅片尺寸和翅片间距，研究它们对截断直径评价指标的影响。通过极差分析确定最佳组合方案，并对优化前后的旋风分离器性能进行对比分析。结构参数对截止直径的显着影响按降序排列为翅片间距、翅片尺寸和底部宽度。对于直径为0.1、0.5、1、2和3μm的颗粒，优化后的螺旋三角翅片旋风分离器的分离效率分别提高了7.4%、15.9%、20.1%、10.9%和14.8%。此外，翅片式旋风分离器的截流直径减小了 30.7%，而压降仅增加了 6.6%。短路流和返混得到缓解，从而大大提高了流场的稳定性。因此，发现翅片旋风分离器在增加细颗粒物的分离方面起着关键作用。翅片式旋风分离器的截流直径减小了30.7%，而压降仅增加了6.6%。短路流和返混得到缓解，从而大大提高了流场的稳定性。因此，发现翅片旋风分离器在增加细颗粒物的分离方面起着关键作用。翅片式旋风分离器的截流直径减小了30.7%，而压降仅增加了6.6%。短路流和返混得到缓解，从而大大提高了流场的稳定性。因此，发现翅片旋风分离器在增加细颗粒物的分离方面起着关键作用。