环下润滑供油通道流量分配特性的数值研究  

Numerical study on flow distribution characteristics of under-race lubrication oil passage

作　　者：朱泽韬 吕亚国[1] 朱鹏飞[1] 曹逸韬 刘振侠[1] ZHU Zetao;LYU Yaguo;ZHU Pengfei;CAO Yitao;LIU Zhenxia(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China;Hunan Aviation Powerplant Research Institute,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China)

机构地区：[1]西北工业大学动力与能源学院,西安710129 [2]中国航发湖南动力机械研究所,湖南株洲412002

出　　处：《航空动力学报》2025年第1期90-100,共11页Journal of Aerospace Power

基　　金：国家科技重大专项(J2019-Ⅲ-0023-0067)。

摘　　要：为探究环下润滑供油通道滑油流量分配特性,采用volume of fluid(VOF)方法对轴心射流收油环内部两相流动进行了计算,获得了供油通道内油膜形成过程与流场特征,重点讨论了供油温度、主轴转速、供油流量及供油孔径组合对流量分配的影响规律,建立了临界孔径比的无量纲关联式。结果表明:滑油射流冲击收油环中心后形成油膜,其边缘断裂形成油带、油矢甩至侧壁面,最终油膜铺满整个端面;计算工况范围内,滑油分配主要受供油流量及孔径影响,各出口流量随供油流量上升均呈线性增加,滑油分配比随供油流量增加而平均降低15.05%;滑油分配比随下游孔径与孔径比的增加而上升;当无量纲供油流量越大且下游无量纲孔径越小时,临界孔径比越高并趋近于1,当无量纲供油流量降低或下游无量纲孔径增大时,临界孔径比则下降。In order to study the oil distribution characteristics of the under-race lubrication oil passage,the volume of fluid(VOF)method was used to calculate two-phase flow in the axis jet oil receiving scoop,and the formation process of oil film and the flow field characteristics in the passage were obtained.The effects of the oil temperature,shaft speed,oil volume flow rate,and aperture combination on the oil flow distribution were emphatically discussed,and the dimensionless correlation formula of the critical aperture ratio was established.The results showed that,the oil jet impinged on the center of the oil receiving scoop and formed an oil film,and the oil droplets and the oil belts formed by the broken film edge were thrown to the side wall,finally the oil film covered the entire end face.Within the calculation range of operating conditions,the distribution of lubricating oil was mainly affected by the oil volume flow rate and aperture.The flow rate at each outlet increased linearly with the increase of oil volume flow rate,and the oil distribution ratio decreased by an average of 15.05%with the increase of oil volume flow rate.The oil distribution ratio increased with the increase of downstream hole diameter and the aperture ratio.When the dimensionless oil supply flow was larger and the downstream dimensionless hole diameter was smaller,the critical aperture ratio was higher and approached to 1,when the dimensionless oil supply flow decreased or the downstream dimensionless hole diameter increased,the critical aperture ratio declined.

关 键 词：环下润滑 供油通道 流量分配特性 临界孔径比 VOF方法 

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]