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采用雷诺应力模型(Reynolds stress model,RSM)对两种不同入口高宽比分离器的气相流场进行了数值模拟,同时用拉格朗日法模拟了分离器内颗粒的运动轨迹.结果表明:数值计算得到的分离器效率和气相流场分布与试验结果基本吻合;在相同入口面积下,入口高宽比大的分离器B的分离效率比分离器A约高2%~8%,但分离器B的压降也更大;分离器B内气相的切向速度大、颗粒平均进入位置低以及颗粒运动至壁面的距离短,有利于提高其分离效率,但是分离器B的短路流及排尘口附近偏心的纵向环流更大,不利于分离效率的提高.
The Reynolds stress model (RSM) was used to simulate the gas flow fields of two different aspect ratio separators, and the Lagrange method was used to simulate the particle trajectories in the separator. The results show that: The calculated separator efficiency and gas flow field distribution are in good agreement with the experimental results. At the same inlet area, the separation efficiency of separator B with inlet aspect ratio is about 2% ~ 8% higher than that of separator A, but the separation The pressure drop of B is larger; the tangential velocity of the gas phase in separator B is large, the average particle entering position is low and the distance of particle movement to the wall is short, which is beneficial to improve the separation efficiency. However, Eccentric vertical flow around the dust mouth larger circulation is not conducive to the improvement of separation efficiency.