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The Improvement of Air/Oil Separator Performance in the Aero-Engine Lubrication System

[+] Author Affiliations
Lyu Yaguo, Shen Jieyang, Liu Zhenxia, Hu Jianping

Northwestern Polytechnical University, Xi’an, China

Paper No. GT2017-64327, pp. V009T27A017; 10 pages
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5096-1
  • Copyright © 2017 by ASME


Air/oil separator plays an important role in the aero-engine lubricating oil system, and connects oil cavity and atmospheric environment, where it is used to separate oil from oil-gas two-phase flow and reduce the consumption of lubricating oil. Oil-gas separation efficiency and flow resistance are two key performance parameters of the separator. This paper focuses on how to improve the separation efficiency of one certain air/oil separator, which has many venting holes, under the condition of keeping the stability of flow resistance. Based on the mathematical model, a large number of numerical calculations were carried out using the ANSYS-Fluent. The characteristics of oil-gas separation efficiency, flow resistance were achieved firstly, although the venting holes number changes from 4 to 15, but the holes total flow area is constant, under the same operate condition. In addition, the separation efficiency for single diameter oil droplet was also calculated when the venting holes number changes. The results show that increase the venting holes can effectively reduce the minimum oil droplets diameter which could be separated, improve the separation efficiency and maintain steady flow resistance at the same time. The result of this study may provide an idea or method for the optimization and improvement of Air/oil separator with similar structure.

Copyright © 2017 by ASME



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