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首页> 外文期刊>International Journal of Heat and Mass Transfer >Investigation on a micro-pin-fin based membrane separator
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Investigation on a micro-pin-fin based membrane separator

机译：基于微针翅片的膜分离器的研究

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摘要

We proposed a micro-pin-fin based membrane separator. An enclosed membrane with micron scale holes was symmetrically populated in a rectangular duct. When gas phase interacts with the membrane, the gas-liquid interface cannot break through the pin-fin holes due to the increased surface energy. A two-dimensional numerical model simulated the separation process. The volume of fluid (VOF) method tracked the gas-liquid interface. Multiscale grids were used. When a bubble attacks the pin-fin membrane, strong liquid circulation occurs at the membrane entrance. Pressures in the side region are larger than those in the core region. Liquid plugs are shortened due to the pressure driven flow from side region to core region to cause the bubble coalescence. The separation length was shortened while increasing the gas flow rates. The bubble lengths were weakly influenced by gas flow rates. Liquid plugs are quickly shortened following the membrane entrance. The frictional pressure drop of the two-phase mixture in the side region was larger than that of liquids in the core region, even at low gas flow rates. The ultra-large gas flow rates yielded quite large bubble pressure to exceed the capillary pressure limit, causing the separator failure. Ultra-low and large gas flow rates specified the separator operation range.
机译：我们提出了一种基于微针翅的膜分离器。将具有微米级孔的封闭膜对称地填充在矩形管道中。当气相与膜相互作用时，由于增加的表面能，气液界面无法穿过针翅孔。二维数值模型模拟了分离过程。流体体积（VOF）方法跟踪了气液界面。使用了多尺度网格。当气泡侵蚀针翅式膜时，膜入口处会发生强烈的液体循环。侧面区域的压力大于核心区域的压力。由于从侧面区域到核心区域的压力驱动流而引起气泡聚结，从而缩短了液塞。分离长度缩短，同时增加了气体流速。气泡长度受气体流速的影响很小。隔膜进入后，液体塞会迅速缩短。即使在低气体流量下，侧部区域中两相混合物的摩擦压降也比芯部区域中的液体大。超大的气体流速产生了很大的气泡压力，超过了毛细管压力极限，导致分离器故障。超低和大气体流量指定了分离器的工作范围。

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