Experimental And Numerical Study On Separation Performance Of The Impeller Type Ventilator

Rotary impeller aerator is one of the components of aero engine lubricating oil system.It has the great significance to the normal operation of the lubricating oil system.The working principle is using the rotating centrifugal force to separate two phase.Due to the impeller type ventilator directly installed in bearing chamber,eliminating external exhaust pipe and the plate with the plane of the interface framework such as device.At present,comparing with a large number of application of centrifugal ventilator,the impeller type ventilator related experimental research method and the available data is less,and the development of multiphase flow theory is limited.The study of a theory of the impeller type ventilator is still not perfect.To this end,this article adopts the method of experiment and numerical simulation to study of the impeller type ventilator.Experimental device was designed and set up the experimental system.Processing main equipment of two-phase mixing device and experimental section.Adopt reasonable test method to test the particle size of experimental section inlet,outlet and the separation efficiency.Using the orthogonal experiment scheme to design the experiment scheme.The experimental data is obtained by experimental system.Analyzing experimental data to determine the significance of factors that affects the separation efficiency and to determine the optimal level of various factors and get the influence law of various factors on the separation efficiency.Determining the mathematical relationship of separation efficiency and the factors.Using three kinds of turbulence model under different conditions of ventilator to simulate the drop of pressure.Compared with the calculated results and the experimental results,obtained RNG k-ε turbulence model to calculate the flow field of ventilator.Combined with DPM two-phase flow model and RNG k-ε turbulence model to finally calculate the separation efficiency.Finally,by the numerical simulation methods under different working conditions on the structure of ventilator and operation condition to analyze its influence on separation performance.