产涡凝聚区流场及颗粒运动轨迹模拟研究
Simulation Study on Flow Field and Particle Trajectory of Vortex Condensation Region
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摘要: 亚微米细微颗粒物凝聚技术是对亚微米细微粉尘进行阻隔和收集的有效方法。为了对亚微米细微粉尘凝聚装置中含尘气流流场及颗粒运动轨迹进行模拟，应用Fluent软件，采用格子波尔兹曼模型模拟含尘气流流场，采用离散相（discrete phase models，DPM）模型模拟颗粒运动轨迹，对不同速度入口下和不同粒径的颗粒轨迹分布进行了数值模拟和分析。结果表明：凝聚区中的产涡装置可以产生随速度变化的不同尺度的涡；随着颗粒粒径的减小，越易受湍流作用的影响，碰撞几率越大。Abstract: The submicron fine particle agglomeration technique is an effective method of blocking and collecting submicron fine dust. In order to simulate dust flow field and particle trajectories in the submicron fine particle agglomeration device, the software Fluent was applied in this test, Lattice Boltzmann model was used to simulate the dust stream flow field, and discrete phase models were used to simulate particle trajectories, the numerical simulation and analysis was carried out for particle trajectories distribution under different inlet velocity and different particle size. The results showed that the vortex generation device in the condensation zone could produce different scale vortex with the speed changing; as the particle size decreasing, the particle was more easily affected by turbulence, the collision probability was greater.
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Keywords:
- mineral dust /
- submicron fine particles /
- trajectory /
- discrete phase /
- numerical simulation /
- dust condensation
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