This paper studies a novel gas cyclone with a cylindrical filter face installed in the center from the vortex finder to the bottom hopper. The experimental results show that this composite cyclone has a higher collection efficiency and a lower pressure drop than the original cyclone. The mechanisms for the improvement are analyzed by both physical experiments and numerical simulations. By measuring dust samples collected at different places it is revealed that the center filter can prevent fine particles from entering the inner vortex and escaping, which accounts for the increase of the collection efficiency. In addition, the flow field of the composite cyclone is simulated by computational fluid dynamics and compared with that of the original cyclone. The analysis shows that with the filter layer installed, the swirling flow disappears in the vortex finder, which decreases the kinetic energy dissipation and hence lowers the pressure drop.

本文研究了一种新型的气体旋风分离器，该旋风分离器的中心安装在从涡流探测器到底部漏斗的中央。实验结果表明，该复合旋风分离器比原始旋风分离器具有更高的收集效率和更低的压降。通过物理实验和数值模拟对改进的机理进行了分析。通过测量在不同位置收集的粉尘样品，可以看出中央过滤器可以防止细颗粒进入内部涡流并逸出，这导致了收集效率的提高。此外，通过计算流体动力学模拟了复合旋风分离器的流场，并将其与原始旋风分离器的流场进行了比较。分析表明，安装了过滤器层后，