管式除雾器开孔对除雾性能影响的数值模拟研究

通过数值模拟的方法，研究了开孔数量、液滴粒径和流速对管式除雾器除雾效率以及流动阻力损失的影响。使用湍流模型和离散相模型分别计算连续相气体以及液滴运动。研究结果表明，管式除雾器的除雾效率随着液滴粒径和流速的增大而增加，而且管式除雾器对小液滴的除雾效果明显，可以去除约62%的5μm的液滴以及69%的10μm的液滴。另外，通过翅片开孔可以有效降低管式除雾器的流动阻力。在所研究的流速范围内，开孔管式除雾器的流动阻力可以降低约50%。通过研究可以得出，管式除雾器对小液滴具有较高的除雾效率，通过打孔可以降低管式除雾器的流动阻力，但也会降低除雾效率。此研究成果可为管式除雾器的理论研究以及工业应用提供依据。

Numerical Simulation on Separation Performance of Tube Mist Eliminator with Holes

In this paper, the numerical simulation is carried out to study the effect of the number of the holes, the size of the droplets and the velocity on the separation efficiency and the pressure drop in the tube mist eliminator. The turbulence model and the discrete phase model are used respectively to calculate the movements of the continuous phase and the droplets. The results show that the separation efficiency of the eliminator increases with the increase of the droplet diameter and the velocity. In particular, the eliminator is more effective in removing small droplets. There are approximately 62% of 5 μm and 69% of 10 μm droplets being captured by the tube mist eliminator. In addition, the fins with holes can reduce the pressure drop by 50% in the tube mist eliminator under the studied condition. This study concludes that the tube mist eliminator possesses high separation efficiency on small droplets. Cutting holes on the fins can lower not only the flow resistance, but also the separation efficiency. This conclusion can provide a good basis for theoretical researches and industrial application of the tube mist eliminator.