This work investigates the relationship between wet (multi-phase) pressure drop, saturation and filter face velocity in mist (or coalescing) filters in order to evaluate optimum operating conditions. Three different structural types of oleophobic filter media (fibrous, knitted and open-cell foam), with equivalent clean filtration efficiency and pressure drop, were investigated numerically over a wide range of inlet velocities (0.05–2 m·s⁻¹). The numerical results indicate the balance between saturation/flow resistance and pressure drop of the filter media with increasing velocity. Experiments were also conducted to validate the trends found in simulations. Both the numerical and experimental results show a local optimum in the pressure drop profile, due to flow regime transition. This effect has not previously been documented due to a lack of parametric studies in this region. This region may be an optimal operating regime for some applications.

这项工作研究了湿（多相）压降，饱和度和雾（或聚结）过滤器中过滤器表面速度之间的关系，以评估最佳运行条件。在相当大的入口速度范围（0.05–2 m·s ^-1）下，对三种不同结构类型的疏油性过滤介质（纤维，针织和开孔泡沫）进行了等效的清洁过滤效率和压降的研究。）。数值结果表明，随着流速的增加，饱和度/流阻与过滤介质的压降之间达到平衡。还进行了实验以验证模拟中发现的趋势。数值和实验结果均显示出由于流态转换而导致的压降分布局部最优。由于该地区缺乏参数研究，因此以前尚未记录到这种效果。对于某些应用而言，该区域可能是最佳的工作方式。