离心通风器转子壁面油膜分布的数值研究  

Numerical study of film distribution on the wall of oil-air separator's rotor

作　　者：胡慧[1] 徐让书[1] 邵长浩 张所刚[1] 

机构地区：[1]沈阳航空航天大学航空航天工程学部(院),沈阳110136

出　　处：《沈阳航空航天大学学报》2014年第3期14-18,共5页Journal of Shenyang Aerospace University

摘　　要：对某型航空发动机离心通风器内部流场进行数值模拟,分析不同通风孔偏心距下,油滴颗粒与转子壁面发生碰壁,在转子壁面上形成油膜的分布情况。以离心通风器内空气与滑油颗粒组成的两相流为研究对象,采用壁面液膜模型(wall film model)模拟油滴颗粒与转子壁面之间的碰撞过程。分别计算了通风孔偏心距e为5 mm、7 mm、9 mm时各壁面油膜厚度值,并分析了油膜厚度及运动的变化趋势。结果表明:各壁面的油膜厚度随通风孔偏心距的增加而加大,在e为7 mm时,通风孔内壁和旋转空心轴内壁的油膜厚度出现最大值。Numerical simulation of a certain type of aircraft engine internal flow field of oil-air separator is carried out. Under different breather holes eccentricity, the distribution of the film forming on the wall of the rotor is analyzed when the droplet particles hit the wall of the rotor. Taking the two-phase flow in the oil-air separator which consists of air and oil particles as the research object, collision process between particle droplets and the rotor wall is simulated using the wall film model, The thickness of the wall film is calculated when the breather holes eccentricity is 5 （7and 9）mm, and the variation trend of film thickness and its motion is also analyzed. The results show that the film thickness of oil wall will increase with the increase of breather holes eccentricity,and when e is 7mm,the thickness of wall film on breather hole＇s inner wall and the rotating hollow shaft＇s wall has a maximum value.

关 键 词：离心通风器 壁面液膜 油膜厚度 通风孔偏心距 数值计算 

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]