Volume 29 Issue 8
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SUN Heng-chao, CHEN Guo-ding, CHEN Bo. Modeling method of bearing chamber oil/air two-phase flow under multi-geometrical conditions[J]. Journal of Aerospace Power, 2014, (8): 1987-1995. doi: 10.13224/j.cnki.jasp.2014.08.029
Citation: SUN Heng-chao, CHEN Guo-ding, CHEN Bo. Modeling method of bearing chamber oil/air two-phase flow under multi-geometrical conditions[J]. Journal of Aerospace Power, 2014, (8): 1987-1995. doi: 10.13224/j.cnki.jasp.2014.08.029

Modeling method of bearing chamber oil/air two-phase flow under multi-geometrical conditions

doi: 10.13224/j.cnki.jasp.2014.08.029
  • Received Date: 2013-05-07
  • Publish Date: 2014-08-28
  • The similarity of oil/air two-phase flow in aero-engine bearing chambers was derived according to the basic theorems of thermodynamic and fluid dynamic firstly, the similarity criterion numbers such as Froude number, Euler number, Reynolds number, Prandtl number and Eckert number were obtained, then the model of aero-engine bearing chamber oil/air two-phase flow was built under multi-geometrical and operating conditions following the principle of system similarity. The oil/air two-phase flow fields of prototype and modeling bearing chambers were solved by numerical simulation, and the better consistency of flow fields dimensionless physical characteristic parameters, such as dimensionless tangential velocity, temperature and pressure between prototype and modeling bearing chambers, illustrates that the similarity criterion numbers and modeling method of aero-engine bearing chamber oil/air two-phase flow proposed are reliable. The proposal modeling method has certain reference value for guiding experiment design of bearing chamber oil/air two-phase flow as well as promoting the shift of theory investigation to engineering application of aeroengine lubrication system design.

     

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