基于FLUENT轧机油膜轴承空化现象的仿真与分析  

Simulation and analysis on cavitation phenomenon of oil-film bearing in roll mill based on FLUENT

作　　者：王荣耀[1] 朱琳[1] 王建梅[1] 吴小军[1] 李玉贵[1] 

机构地区：[1]太原科技大学重型机械教育部工程研究中心,山西太原030024

出　　处：《重型机械》2013年第4期22-25,共4页Heavy Machinery

基　　金：国家青年科学基金资助项目(No.51205269)

摘　　要：基于RANS方程和两相流模型以及自然空化模型,采用有限体积法建立了气、液混合数值模拟方法,并对计算域进行分块网格划分,模拟了轧机油膜轴承的空化现象以及空穴区的迁移情况,得到油膜的压力场和不同转速下空穴区气相体积分数分布。研究发现:影响油膜发生空化现象的主要因素是流场的局部绝对压强,转速对空穴区的迁移有明显的影响,而流场的边界状态是仿真成功的关键。本次研究内容对优化油膜轴承的结构以及提高油膜的工作稳定性提供了有效的参考。Based on the RANS equations and two-phase flow model, coupling with a natural cavitation model, a gas-liquid mixture numerical simulation method is established to simulate the cavitation phenomenon and migration of cavitation zone in rolling mill oil film bearing by Finite Volume Method （FVM） with block meshing. The oil film pressure field and gas phase volume fraction contours are achieved. The study found that the main factor of appearing cavitation is the absolute pressure of the local flow field; the revolution has a significant impact on the migration of cavitation; and the boundary of flow field is the successful key to the simulation. The study concerned is useful for optimizing the structure of the oil film bearing and improving the working stability of the film.

关 键 词：油膜轴承 有限体积法 压力分布 空化现象 空穴迁移 

分 类 号：TH133.3[机械工程—机械制造及自动化]