蜂窝式轴心通风器油气分离性能计算  

Computation on oil/gas separation performance of axial breather with honeycomb structure

作　　者：赵静宇[1] 刘振侠[1] 吕亚国[1] 胡剑平[1] 任国哲[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710129

出　　处：《航空动力学报》2016年第7期1583-1590,共8页Journal of Aerospace Power

摘　　要：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.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 per-formance of axial breather with honeycomb structure under different rotational speeds, mass flow rates and enviromental temperatures were calculated and analyzed. Results show that the inerease of rotational speed will improve the oil/gas separation efficiency, while the in-crease 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, butplays a major role in the oil separation of axial breather, where the contribution rate to the oil separation accounts for 80% or more.

关 键 词：航空发动机 轴心通风器 蜂窝结构 油气两相流 油滴/壁面相互作用 油气分离效率 

分 类 号：V233.4[航空宇航科学与技术—航空宇航推进理论与工程]