Journal
TRIBOLOGY INTERNATIONAL
Volume 145, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2020.106168
Keywords
Squeeze film dampers; Air ingestion; CFD; Damping
Categories
Funding
- National Natural Science Foundation of China [51505300]
- Scientific Research Fund of Liaoning Provincial Education Department [JYT19061]
- Natural Science Foundation of Liaoning Province [2019-ZD-0233]
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Considering the effect of air ingestion, a three-dimensional CFD model of open ends squeeze film damper (SFD) was established based on transient time step solution method and dynamic mesh technique. And the model was experimentally verified by bidirectional excitation experiment. Experiment and CFD simulation shows that air ingestion was caused by the pressure difference between oil film and external environment. With increasing precession frequency and eccentricity ratio, air ingestion area is gradually expanding resulting in increasing air volume, shrinking effective coverage of oil film and performance degradation of damper. Thereby, oil film damping shows the tendency to reduce. Compared with the case without considering air ingestion, the case considering air ingestion has obviously smaller peak pressure in the CFD simulation.
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