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Separation performance study of oil-gas separator in aero‑engine lubrication and sealing system
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Kening LI1, Xingyun JIA1, Deming XIONG2, Dali DAI3, Huichuan CHENG4, Zhihong ZHANG4
Fluid Machinery | 2025, 53(10) : 73 - 80
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Fluid Machinery | 2025, 53(10): 73-80
Separation performance study of oil-gas separator in aero‑engine lubrication and sealing system
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Kening LI1, Xingyun JIA1, Deming XIONG2, Dali DAI3, Huichuan CHENG4, Zhihong ZHANG4
Affiliations
  • 1Ministry of Chemical Safety Education Engineering Research Centre，Beijing University of Chemical Technology，Beijing 100029，China
  • 2Chongqing Dema High Speed Equipment Engineering Research Institute Co.，Ltd.，Chongqing 402284，China
  • 3Chongqing Dema Magnetic Levitation Technology Co.，Ltd.，Chongqing 402284，China
  • 4China Aero Engine Research Institute，Beijing 101304，China
Published: 2025-10-31 doi: 10.3969/j.issn.1005-0329.2025.10.009
Outline
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To address the effective degassing problem of oil-air mixtures in aero‑engine lubrication systems，a dynamic pressure oil-gas separator with a square inlet and simple compact structure is proposed.A combination of simulation and experimental methods was used to analyze its separation performance，and the control variable method was applied to investigate the influence laws of flow velocity，oil volume fraction，and oil droplet size on separation efficiency.The results show that the separation efficiency of the oil-gas separator is highest under high flow velocity and low oil volume fraction conditions；flow velocity has a significant impact on separation performance，achieving a maximum air separation efficiency ηd of 88.8% at 35 m/s；oil volume fraction also notably affects separation performance，reaching a maximum oil separation efficiency ηc of 93.5% at an oil volume fraction of 5% and droplet size of 5 μm.For large droplets with sizes of 15 μm and above，the separation efficiency ηk of this dynamic pressure oil-gas separator approaches 100%.This study can provide references for the development of oil-gas separators with high separation efficiency and low flow resistance.

lubrication and sealing system  /  oil‑gas separator  /  separation efficiency  /  numerical simulation
李柯宁, 贾兴运, 熊德明, 戴大利, 程会川, 张志红. 航空发动机润滑密封系统油气分离器分离性能研究. 流体机械, 2025 , 53 (10) : 73 -80 . DOI: 10.3969/j.issn.1005-0329.2025.10.009
Kening LI, Xingyun JIA, Deming XIONG, Dali DAI, Huichuan CHENG, Zhihong ZHANG. Separation performance study of oil-gas separator in aero‑engine lubrication and sealing system[J]. Fluid Machinery, 2025 , 53 (10) : 73 -80 . DOI: 10.3969/j.issn.1005-0329.2025.10.009
Appendix
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Year 2025 volume 53 Issue 10
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Article Info
doi: 10.3969/j.issn.1005-0329.2025.10.009
  • Receive Date：2025-04-30
  • Online Date：2026-10-20
  • Published：2025-10-31
Article Data
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History
  • Received：2025-04-30
  • Revised：2025-08-25
Affiliations
    1Ministry of Chemical Safety Education Engineering Research Centre，Beijing University of Chemical Technology，Beijing 100029，China
    2Chongqing Dema High Speed Equipment Engineering Research Institute Co.，Ltd.，Chongqing 402284，China
    3Chongqing Dema Magnetic Levitation Technology Co.，Ltd.，Chongqing 402284，China
    4China Aero Engine Research Institute，Beijing 101304，China
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小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
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