摘要
针对极低供油压力工况开展实验研究,以考察气液两相流对挤压油膜阻尼器(SFD)油膜参数特性的影响。结果表明:当SFD入口气体体积分数小于0.9时,油膜阻尼随着入口气体体积分数的增加而减小,直至气体体积分数增大到0.9时,油膜阻尼是纯油状态时阻尼的60%;当气体体积分数大于0.9时,油膜阻尼大幅减小至几乎可以忽略不计。现有理论模型并不适用于极低供油压力工况。基于实验结果,找到了最符合SFD两相流动的等效黏度模型,其理论预测的油膜阻尼与不同供油压力下的实验数据吻合较好,为SFD两相流研究的模型选择提供了依据。
Influence of two-phase flow on the oil film characteristic of squeeze film damper(SFD)under extremely low oil supply pressure was investigated through tests.The test results showed that the oil film damping decreased with the increase of gas volume fraction when the gas volume fraction is under 0.9.As the gas volume fraction reached 0.9,the damping was 60%of the damping of pure oil.The damping decreased dramatically to negligible,as the gas volume fraction continued increasing beyond 0.9.The trend can not be predicted by the existing theoretical model.Based on the test results,the best-fitting model for the two-phase flow of SFDs was used to predict the damping coefficients of SFD,which can match the test results under both large and low oil supply pressures.The model can provide a reliable theoretical basis for the selection of SFD two-phase flow model.
作者
张微
王浩洁
丁千
马辉
ZHANG Wei;WANG Haojie;DING Qian;MA Hui(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110000,China;Key Laboratory of Vibration and Control of Aero-Propulsion System,Ministry of Education,Northeastern University,Shenyang 110819,China;Department of Mechanics,School of Mechanical Engineering,Tianjin University,Tianjin 300350,China;School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2020年第3期560-568,共9页
Journal of Aerospace Power
基金
航空动力装备振动及控制教育部重点实验室开放基金(VCAME201906)
国家自然科学基金(11902202)
辽宁省科技厅博士启动基金(2019-BS-184).
关键词
挤压油膜阻尼器
两相流
供油压力
周期激励
脉冲激励
squeeze film damper
two-phase flow
oil supply pressure
periodic excitation
impact excitation
