附壁分离元件性能研究

Study of performance of wall-attached separation component

中文关键词: 附壁分离元件  分离效率  压降  数值模拟

英文关键词: wall-attached separation component  separation efficiency  pressure drop  numerical simulation

中文摘要:

      提出了一种新的附壁分离元件，其具有操作气速范围广、结构紧凑、分离效率高等优点．通过数值模拟和实验，研究了分离弧内直径、入口气速和液滴粒径分布等因素对附壁分离元件性能的影响．研究结果表明：附壁分离元件在低入口气速时即具有较高的分离效率，入口气速大于1 m/s时附壁分离元件对于10 μm的液滴能够达到80%以上的分离效率，对于15 μm及以上的液滴可以100%分离；分离效率随着入口气速的增大而增大，但在一定的粒径分布条件下，存在一个临界入口气速，大于临界入口气速后分离效率反而下降．在入口气速、液滴粒径分布相同时，分离弧内直径越小，分离效率越高．附壁分离元件的压降随着气速的增大呈现二次方增大的关系．

英文摘要:

      A new wall-attached separation component, which has the advantages of wide operating gas velocity range, compact structure and high separation efficiency is proposed. Through the methods of numerical simulation and experiment, the influence of factors such as the size of the inner diameter of the separation arc, the inlet gas velocity and the droplet particle size distribution on the performance of the wall-attached separation component is studied. The research results show that: the wall-attached separation component has high separation efficiency at low inlet gas velocity, when the inlet gas velocity is larger than 1 m/s, the wall-attached separation component can separate above 80% of droplets of 10 μm, and 100% of the droplets of 15 μm and above. The separation efficiency increases with the increase of the inlet gas velocity, but there is a critical inlet gas velocity under some particle size distribution, the separation efficiency decreases when the inlet gas velocity is larger than the critical inlet gas velocity. The smaller the inner diameter of the separation arc, the higher the separation efficiency under the same inlet gas velocity and particle size distribution of droplets. The pressure drop of the wall-attached separation component shows a quadratic increase with the increase of the inlet gas velocity.