环下润滑供油通道流量分配特性的数值研究

朱泽韬; 吕亚国; 朱鹏飞; 曹逸韬; 刘振侠

doi:10.13224/j.cnki.jasp.20230255

环下润滑供油通道流量分配特性的数值研究

doi: 10.13224/j.cnki.jasp.20230255

朱泽韬¹,
吕亚国^1,*, ,,
朱鹏飞¹,
曹逸韬^{1, 2},
刘振侠¹

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

基金项目: 国家科技重大专项（J2019-Ⅲ-0023-0067）

详细信息

作者简介:
朱泽韬（1997-），男，博士生，主要从事航空发动机润滑系统两相流研究

通讯作者:
吕亚国（1980-），男，副教授，博士，主要从事航空发动机润滑系统研究。E-mail：yglu@nwpu.edu.cn

中图分类号: V233.4
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出版历程
- 收稿日期: 2023-04-17
- 网络出版日期: 2024-09-14

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

ZHU Zetao¹,
LYU Yaguo^{1,*
, ,},
ZHU Pengfei¹,
CAO Yitao^{1, 2},
LIU Zhenxia¹

1.
School of Power and Energy，Northwestern Polytechnical University，Xi’an 710129，China
2.
Hunan Aviation Powerplant Research Institute，Aero Engine Corporation of China，Zhuzhou Hunan 412002，China

摘要

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。
- 环下润滑 /
- 供油通道 /
- 流量分配特性 /
- 临界孔径比 /
- VOF方法
Abstract:
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.
- under-race lubrication /
- oil passage /
- flow distribution characteristics /
- critical aperture ratio /
- VOF method

HTML

图 1 环下润滑结构模型

Figure 1. Under-race lubrication structure model

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图 2 计算模型及网格

Figure 2. Computational model and mesh

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图 3 时间步长独立性验证

Figure 3. Independence verification of time step

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图 4 旋转流道网格

Figure 4. Mesh of rotating tube

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图 5 流量实验值与计算值的比较

Figure 5. Comparison of experimental and calculative results of volume flow rate

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图 6 供油孔编号说明

Figure 6. Oil hole number description

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图 7 收油环壁面滑油迁移过程

Figure 7. Oil migration process at end surface of oil receiving scoop

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图 8 供油通道内滑油分布

Figure 8. Distribution of oil in the oil passage

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图 9 供油通道内速度分布

Figure 9. Distribution of velocity in the oil passage

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图 10 不同供油流量下温度对1号孔流量的影响

Figure 10. Effects of oil temperature on volume flow rate of outlet 1 at different oil volume flow rates

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图 11 不同供油流量下滑油温度对滑油分配比的影响

Figure 11. Effects of oil temperature on oil distribution ratio at different oil volume flow rates

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图 12 不同孔径比下转速对1号孔流量的影响

Figure 12. Effects of rotating speed on volume flow rate of outlet 1 at different aperture ratios

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图 13 不同孔径比下转速对滑油分配比的影响

Figure 13. Effects of rotating speed on oil distribution ratio at different aperture ratios

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图 14 不同孔径比下供油流量对各孔流量的影响

Figure 14. Effects of oil volume flow rate on oil volume flow rate of each outlet at different aperture ratios

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图 15 不同孔径比下供油流量对滑油分配比的影响

Figure 15. Effects of oil volume flow rate on oil distribution ratio at different aperture ratios

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图 16 不同流量下孔径比对各孔流量的影响

Figure 16. Effects of aperture ratio on oil volume flow rate of each outlet at different oil volume flow rates

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图 17 不同流量下孔径比对滑油分配比的影响

Figure 17. Effects of aperture ratio on oil distribution ratio at different oil volume flow rates

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图 18 不同下游孔径下孔径比对各孔流量的影响

Figure 18. Effects of aperture ratio on oil volume flow rate of each outlet at different downstream apertures

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图 19 不同孔径比下下游孔径对分配比的影响

Figure 19. Effects of downstream aperture on oil distribution ratio at different aperture ratios

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图 20 临界孔径比拟合面

Figure 20. Fitting surface of critical aperture ratio

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图 21 各无量纲孔径下无量纲流量对临界孔径比的影响

Figure 21. Effects of dimensionless oil volume flow rate on critical aperture ratio at different dimensionless apertures

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表 1 收油环结构参数

Table 1. Structure parameters of oil receiving scoop mm

参数	数值
收油环内径	40
收油环外径	50
供油孔间距	10
供油孔直径	1.0
供油孔长度	5.0

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表 2 滑油物性参数

Table 2. Oil physical parameters

温度/℃	密度/（kg/m³）	运动黏度/（mm²/s）
60	968.8	12.94
75	957.1	9.05
90	945.6	6.24
105	932.8	4.42
120	920.4	3.30

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表 3 旋转流道主要尺寸

Table 3. Main dimensions of rotating tube mm

位置	直径	长度
入口	6.35	25.4
分支出口 A	6.35	25.4
分支出口B	6.35	25.4
旋流通道	12.7	469.9

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表 4 不同参数组合下的临界孔径比

Table 4. Critical aperture ratio at different parameter combinations

N_q	$ {R'_{\text{d}}} $
N_q	N_d=1.0	N_d=1.2	N_d=1.5	N_d=2.0
1.0	0.836	0.773	0.705	0.621
1.2	0.878	0.809	0.746	0.665
1.3	0.885	0.835	0.761	0.687
1.5	0.901	0.851	0.776	0.706
1.6	0.922	0.862	0.799	0.723
1.8	0.944	0.887	0.809	0.745
2.0	0.951	0.893	0.832	0.757

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