Oil film characteristic of two-phase flow squeeze film damper under extremely low oil supply pressure

ZHANG Wei; WANG Haojie; DING Qian

doi:10.13224/j.cnki.jasp.2020.03.012

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Oil film characteristic of two-phase flow squeeze film damper under extremely low oil supply pressure

更新时间：2026-07-07

- Oil film characteristic of two-phase flow squeeze film damper under extremely low oil supply pressure
- Vol. 35, Issue 3, Pages: 560-568(2020)
- 作者机构：
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- DOI：10.13224/j.cnki.jasp.2020.03.012
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- Published：2020
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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.

doi: 10.13224/j.cnki.jasp.2020.03.012
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. DOI： 10.13224/j.cnki.jasp.2020.03.012.

doi: 10.13224/j.cnki.jasp.2020.03.012 DOI：

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。

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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