Experimental study on agglomeration of submicron mineral dust in vortex generator
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摘要: 为探索亚微米矿尘在产涡凝聚装置中的凝聚规律，通过离散相模型模拟和实验研究了产 涡凝聚装置、涡片间距和含尘气流入口风速对亚微米矿尘凝聚的影响。模拟显示：产涡凝聚装置 改变了颗粒的运动轨迹；涡片间距减小、含尘气流入口风速增大都可以增大凝聚区气流的湍流强 度值和涡量值，使颗粒轨迹更杂乱。实验结果表明：产涡凝聚装置可以促进凝聚，凝聚效率随入 口风速的增大而增大，随涡片间距的增大而减小。Abstract: The effects of vortex generating agglomeration device, vortex spacing and inlet velocity of dust-bearing gas flow on the agglomeration of submicron mineral dust in vortex generator were studied by simulations and experiments to explore the agglomeration laws of submicron mineral dust. The particle trajectory was changed by the vortex generating agglomeration device in numerical simulation,and the turbulent intensity and vorticity of the agglomeration zone could be increased by decreasing the vortex spacing and increasing the inlet velocity of dust-bearing gas flow ,resulting in the particle trajectory become more disordered.The experimental results show that the vortex generating agglomeration device can promote agglomeration , and the agglomeration efficiency of submicron mineral dust increases with the increase of inlet velocity of dust-bearing gas flow and decreases with the increase of vortex spacing.
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