Gas cyclones have many industrial applications for separation of solids and liquids from gases. The geometry of the cyclone is the most influential parameter for its performance. This study investigates the effect of presence of an inner cone located at the bottom of the cyclone on the performance of the cyclone separator. Several CFD simulations in cyclones with inner cones with different diameters and heights were performed using the Reynolds stress turbulence model (RSM). The collection efficiency of the cyclone was studied using the Eulerian-Lagrangian approach. The results showed that the maximum tangential velocity is 1.6–1.7 times the inlet velocity. On the other hand, in the radial sections crossing the inner cone, the gradients of the axial and tangential velocities are zero. The maximum axial and tangential velocities occurred in the region between the top of the inner cone to the vortex finder. It was found that by increasing the inner cone height at constant diameter, the cyclone collection performance improves. An increase in the diameter of the inner cone, however, leads to a decrease in the cyclone performance. In overall, with an increase in the inner cone height and diameter, the pressure loss decreases. Finally, the erosion study was conducted using the Det Norske Veritas (DNV) erosion model. It was found that the value of coefficient of restitution affects the predicted erosion rate. In addition, the collection efficiency decreases when the erosion effect was included in the CFD model especially for higher velocities.

气体旋风分离器具有许多工业应用，可以从气体中分离出固体和液体。旋风分离器的几何形状是影响其性能的最重要参数。这项研究调查了位于旋风分离器底部的内锥的存在对旋风分离器性能的影响。使用雷诺应力湍流模型（RSM）在具有不同直径和高度的内锥的旋风分离器中进行了几种CFD模拟。使用欧拉-拉格朗日方法研究了旋风的收集效率。结果表明，最大切线速度是入口速度的1.6-1.7倍。另一方面，在与内锥相交的径向部分中，轴向和切向速度的梯度为零。最大的轴向和切向速度出现在内锥顶部与涡旋仪之间的区域中。已经发现，通过增加恒定直径的内锥高度，旋风分离器的收集性能得以改善。然而，内锥直径的增加导致旋风分离器性能的降低。总的来说，随着内锥高度和直径的增加，压力损失减小。最后，使用Det Norske Veritas（DNV）侵蚀模型进行了侵蚀研究。发现恢复系数的值会影响预计的侵蚀率。另外，当腐蚀效应包括在CFD模型中时，收集效率会降低，尤其是对于较高速度的情况。已经发现，通过增加恒定直径的内锥高度，旋风分离器的收集性能得以改善。然而，内锥直径的增加导致旋风分离器性能的降低。总的来说，随着内锥高度和直径的增加，压力损失减小。最后，使用Det Norske Veritas（DNV）侵蚀模型进行了侵蚀研究。发现恢复系数的值会影响预计的侵蚀率。另外，当腐蚀效应包括在CFD模型中时，收集效率会降低，尤其是对于较高速度的情况。已经发现，通过增加恒定直径的内锥高度，旋风分离器的收集性能得以改善。然而，内锥直径的增加导致旋风分离器性能的降低。总的来说，随着内锥高度和直径的增加，压力损失减小。最后，使用Det Norske Veritas（DNV）侵蚀模型进行了侵蚀研究。发现恢复系数的值会影响预计的侵蚀率。另外，当腐蚀效应包括在CFD模型中时，收集效率会降低，尤其是对于较高速度的情况。随着内锥高度和直径的增加，压力损失减小。最后，使用Det Norske Veritas（DNV）侵蚀模型进行了侵蚀研究。发现恢复系数的值会影响预计的侵蚀率。另外，当腐蚀效应包括在CFD模型中时，收集效率会降低，尤其是对于较高速度的情况。随着内锥高度和直径的增加，压力损失减小。最后，使用Det Norske Veritas（DNV）侵蚀模型进行了侵蚀研究。发现恢复系数的值会影响预计的侵蚀率。另外，当腐蚀效应包括在CFD模型中时，收集效率会降低，尤其是对于较高速度的情况。