蜂窝式轴心通风器油气分离性能计算

为对航空发动机蜂窝式轴心通风器油气分离效率进行研究，建立考虑油气双向耦合的流场计算方法及油滴/壁面相互作用模型，在验证通风阻力及油气分离效率可靠性的基础上，对不同转速、通风流量和环境温度下蜂窝式轴心通风器的油气分离效果进行计算和分析.结果表明:转速的增加会使油气分离效率得到提升，而通风流量和环境温度的增加则导致油气分离效率的降低.蜂窝孔结构的加入对通风阻力影响不大，却对通风器的滑油分离过程起主要作用，计算表明其对滑油分离贡献率在80%以上. 

Computation on oil/gas separation performance of axialbreather with honeycomb structure

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.