The slotted vortex finder (SVF) represents a novelly modified cyclone vortex finder, which is validated to be valuable and prospective for industrial applications. The main purpose of present study is to illustrate the effect of slotted vortex finder on the swirling turbulent flow characteristics of cyclone separator in comparison with conventional vortex finder (CVF). Based on three cyclone models (CVF, SVF_D1, SVF_D2), the differences of swirling vortical characteristics between SVF and CVF models are comprehensively tested and the influence of SVF insertion length on the cyclone performance was discussed. The overall detailed features and variations of flow pattern, such as velocity profile distribution, unsteady particle tracking, swirl number comparison and special flow phenomena of vortex eccentricity in the whole cyclone separator body, are analyzed in detail. Specifically, The SVF_D2 model could improve the cyclone separation efficiency (about 20% reduction of pressure drop and 4.2% reduction of cut off size) and also reduce 40% of central vortex rotation frequency compared with CVF model at v_in = 16.1 m/s. The current study is beneficial to further clarify the influence of SVF on the mechanism of the particle separation motion in cyclone separator and identify the characterization differences between traditional cyclone separator and cyclone with installation of SVF.

开槽涡旋探测器 (SVF) 代表了一种新改进的旋风涡旋探测器，经验证具有工业应用价值和前景。本研究的主要目的是通过与传统涡流器 (CVF) 的比较，说明开缝式涡流器对旋风分离器旋流湍流特性的影响。基于三种气旋模型(CVF、SVF_D1、SVF_D2)，综合测试了SVF和CVF模型的旋涡特性差异，探讨了SVF插入长度对旋风性能的影响。整个旋风分离器本体的速度剖面分布、非定常粒子跟踪、旋流数比较和旋涡偏心的特殊流动现象等流型的整体细节特征和变化，进行了详细分析。具体而言，与 CVF 模型相比，SVF_D2 模型可以提高旋风分离效率（压降降低约 20%，截流尺寸降低 4.2%），中心涡旋旋转频率降低 40%v _in  = 16.1 米/秒。目前的研究有利于进一步阐明SVF对旋风分离器中颗粒分离运动机理的影响，并确定传统旋风分离器与安装SVF的旋风器之间的表征差异。