| Citation: | WANG Xiaohui, LIU Houlin, LI Ming, et al. Oil scavenge characteristics of aero-engine bearing chambers under high air supply flow rates[J]. Journal of Aerospace Power, 2026, 41（4）：20240814 doi: 10.13224/j.cnki.jasp.20240814
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To investigate the flow behavior and oil scavenge characteristics of oil-air two-phase media in aero-engine bearing chambers under high air supply flow rates, a simulation model was developed based on the volume of fluid (VOF) method. This model was used to analyze the impact of air supply flow rate on the oil-air two-phase distribution within the bearing chamber. A synchronized multi-parameter testing rig, equipped with high-speed imaging technology, was constructed to visualize the oil scavenge characteristics and validate the numerical simulation. The results showed that, for the examined bearing chamber geometry (inner diameter 300 mm, axial width 100 mm), increasing the air supply flow rate reduced oil scavenge but allowed the system to stabilize more quickly. The oil proportion at the scavenge outlet was highly sensitive to changes in air supply flow rates. When the air supply flow rate was below 16 g/s, the oil proportion at the scavenge outlet decreased by 4.6%; when it exceeded 16 g/s, the decrease rate sharply rose to 14.4%. Higher air supply flow rates intensified oil-air mixing, accelerated oil discharge through the vent, and led to a thinner oil film on the chamber wall, ultimately reducing oil accumulation at the scavenge outlet. This study could provide a useful reference for the design of air supply parameters in the bearing chamber sealing systems of aero-engines.
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