轴流旋风分离器特性的数值模拟

为了研究轴流旋风分离器的性能，主要分析2.5~6m/s风速下叶片间距、旋转角度及排尘间隙对旋风分离器阻力和切向速度的影响.结果表明:旋风分离器的阻力随风速的增大而增大;叶片旋转角度对旋风阻力影响不大，但旋转角度的增加可增大最大切向速度;叶片间距变化对阻力和切向速度的影响很大，在6m/s风速下，叶片间距12mm较16mm时阻力增加31.1%，切向速度增大11%;排尘间隙变大可明显增大阻力，对切向速度影响较小.叶片间距为16mm，叶片旋转圆周角为90°，排尘间隙为7.15mm的旋风分离器对A4粗灰的分离效率可达85%以上.本研究结果为轴流旋风分离器几何参数设计提供了依据.

Numerical Simulation on Characteristics of the Axial Flow Cyclone Separator

The characteristics of an axial flow cyclone separator were studied. The effects of blade space， rotating angle and dust exhaust gap on the pressure drop and tangential velocity of the cyclone separator at 2.5~6m/s inlet air velocity were analyzed. The results showed that the pressure drop of the cyclone separator increases with the increase of inlet air velocity. The rotating angle of blades has little effect on the pressure drop of the cyclone， while the maximum tangential velocity increases with the increase of the rotating angle. The pressure drop and tangential velocity are greatly influenced by the change of blade space， and the pressure drop increases 31.1% when the blade space changes from 16mm to 12mm at 6 m/s inlet air velocity， while the tangential velocity increases 11%. Larger dust exhaust gap can significantly increase the pressure drop， and has little effect on tangential velocity. The efficiency of the cyclone separator with 16mm blade space， blade rotating angle of 90 degrees and dust exhaust gap of 7.15mm for A4 coarse dust can reach more than 85%. The results provide a basis for designing geometric parameters of axial flow cyclone separator.