To study the oil/gas separation efficiency of axial breather with honeycomb structure in aero-engine

the oil/gas two-way coupled flow mathematical model and oil droplet impaction model with the wall were established. On the basis of verifying the rationality of flow resistance and oil/gas separation efficiency

the effects of the oil/gas separation performance of axial breather with honeycomb structure under different rotational speeds

mass flow rates and enviromental temperatures were calculated and analyzed. Results show that the increase of rotational speed will improve the oil/gas separation efficiency

while the increase of mass flow rate and enviromental temperature will lead to the decrease of the oil/gas separation efficiency. The honeycomb hole structure has little effect on flow resistance

but plays a major role in the oil separation of axial breather

where the contribution rate to the oil separation accounts for 80% or more.