This paper presents a study of gas-solid flow in a novel cyclone separator with inner cylinder, compared with that in a conventional cyclone. The Reynolds stress model (RSM) is used to simulate fluid flow, and the discrete phase model (DPM) is selected to describe the motion behavior of particles. The experimental data measured by particle image velocimetry (PIV) is used to verify the reliability of the numerical model. The results show that in the novel cyclone, the cleaned gas can be quickly discharged from the vortex finder, the movement distance and residence time of fine particles are prolonged, the short-circuit flow and vertical vortex under the vortex finder are eliminated, the mutual interference between upflow and downflow in the cylinder is eliminated, and the region of quasi-free vortex in the cone is enlarged. Compared with the conventional cyclone, the novel cyclone has higher collection efficiency and lower pressure drop.

与传统旋风分离器相比，本文对新型带内筒旋风分离器的气固流动进行了研究。雷诺应力模型（RSM）用于模拟流体流动，离散相模型（DPM）用于描述颗粒的运动行为。通过粒子图像测速仪（PIV）测量的实验数据用于验证数值模型的可靠性。结果表明，在新型旋风分离器中，净化后的气体可以快速从涡流分离器中排出，延长了细颗粒的移动距离和停留时间，消除了涡流分离器下的短路流和垂直涡流，相互之间消除了圆柱体上流和下流之间的干扰，并扩大了圆锥中的准无旋涡区域。