Based on the two-phase stratified flow model and turbulent model of lubrication oil in bearing chamber,the paper solved three-dimensional Navier-Stokes equations by the method of Volume Of Fluid(VOF) tracing the dynamics of the gas/liquid boundaries.

Based on the two-phase homogenous flow of lubrication oil in bearing chamber,the paper solves three-dimension Navier-Stokes equations by the method of the turbulent model and Finite Differential Method(FDM).

Based on the problem of the gas-liquid two-phase flow in aero-engine bearing chamber lubrication,the model was bulit on the basis of theoretical method of using neural network,from which the gas-liquid two-phase flow regime can be identified in bearing chamber.

Through the identification study on the air-fluid two-phased flow-type of bearing cavity in aero-engine,the prediction model of air-fluid two-phased flowtype was established,thus provided technological support to the identification on air-fluid two-phased flow-type of lubricant inside the bearing cavity of aero-engine.

The cooling system includes the cavity behind the high pressure turbine disc,the cavity in front of the low pressure turbine disc,supporting guide vane cavity,bearing cavity,and some connecting cooling air passages.

The coaxial-cavity is one of the hopeful method raising the electronics efficiency at present, joining the inside conductor axle in the cylinder cavity makes the pattern register nearby work pattern becomes rare and to be of advantage of the model selection, restrain the model competition and recovery electron beam to step-down easily.

By use of coupling matrix in pectination form,a combline coaxial-cavity filter with λg/4-type SIR is designed.