| 极低压下两相流挤压油膜阻尼器油膜参数特性 |
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| 引用本文： | 张微,王浩洁,丁千.极低压下两相流挤压油膜阻尼器油膜参数特性[J].航空动力学报,2020,35(3):560-568. |
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| 作者姓名： | 张微 王浩洁 丁千 |
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| 作者单位： | 沈阳航空航天大学航空宇航学院,沈阳110000;东北大学航空动力装备振动及控制教育部重点实验室,沈阳110819,沈阳航空航天大学航空宇航学院,沈阳110000,天津大学机械工程学院力学系,天津300350,东北大学航空动力装备振动及控制教育部重点实验室,沈阳110819;东北大学机械工程与自动化学院,沈阳110819 |
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| 基金项目： | 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) |
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| 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。
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| 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 |
| 收稿时间： | 2019/9/24 0:00:00 |
Oil film characteristic of two-phase flow squeeze film damper under extremely low oil supply pressure |
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| ZHANG Wei,WANG Haojie,DING Qian.Oil film characteristic of two-phase flow squeeze film damper under extremely low oil supply pressure[J].Journal of Aerospace Power,2020,35(3):560-568. |
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| Authors: | ZHANG Wei WANG Haojie DING Qian |
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| Institution: | 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; |
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| Abstract: | 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. |
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| Keywords: | squeeze film damper two-phase flow oil supply pressure periodic excitation impact excitation |
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