运动油滴/固体壁面斜碰撞及油膜铺展的数值模拟

刘登; 陈国定; 孙恒超

doi:10.13433/j.cnki.1003-8728.2015.0734

运动油滴/固体壁面斜碰撞及油膜铺展的数值模拟

doi: 10.13433/j.cnki.1003-8728.2015.0734

1.
西北工业大学机电学院, 西安 710072

基金项目:

国家自然科学基金项目（51275411）资助

详细信息

作者简介:
刘登（1989-），硕士研究生，研究方向为航空发动机润滑系统设计，dengliu@mail.nwpu.edu.cn

通讯作者:
陈国定，教授，博士生导师，gdchen@nwpu.edu.cn

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- 文章访问数: 222
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- 被引次数: 0
出版历程
- 收稿日期: 2013-12-09
- 刊出日期: 2015-07-05

Numerical Simulation of Oil Droplet Impacting and Spreading on Inclined Solid Wall

1.
School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 基于Volume of Fluid（VOF）方法建立了运动油滴/固体壁面斜碰撞及油膜铺展的数值计算模型，分析了运动油滴/固体壁面斜碰撞后的油膜铺展特征，讨论了油滴入射角、碰撞速度和油滴直径等对油膜铺展特征的影响规律。研究结果表明，前铺展因子随着入射角的减小而增大，随着碰撞速度和油滴直径的增大而增大；后铺展因子绝对值随着入射角和油滴直径的减小而减小，而碰撞速度对其几近没有影响，同时在入射角和油滴直径较小的情况下较易观察到铺展油膜的滑移现象；数值模拟结果与试验结果较好的吻合性证明了该数值模拟方法的正确性。
- 航空发动机 /
- 轴承腔 /
- 油滴 /
- 碰撞 /
- 铺展因子
Abstract: In this paper, the numerical model of oil droplet impacting and spreading on inclined solid wall is established with volume of fluid(VOF) method, and the spreading characteristics of oil droplet impacting on solid wall is analyzed. The influences of incident angle, impact velocity and diameter of oil droplet on spreading factors are discussed particularly. The results show that front spreading factor increases with decreasing incident angle, increasing impact velocity and diameter of oil droplet; the absolute value of back spreading factor decreases with decreasing incident angle and diameter of oil droplet, whereas it is not affected by impact velocity. Slip phenomenon of oil film is easily observed under the condition of smaller incident angle and diameter of droplet. The analysis results are close to the experimental results and that indicate the correctness of numerical simulation method.
- aero-engine /
- bearing chamber /
- computer simulation /
- film thickness /
- impact

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参考文献(15)

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