On the basis of three dimensional viscous numerical simulation on the internal flow field in the vaned diffuser of a centrifugal compressor,the influence of shaper parameters on the pneumatic performance in low solidity vaned diffuser is compared.

In this paper the Kriging model was applied to the aerodynamic optimization design of the vaned diffuser for a high speed centrifugal compressor.

An Experimental investigation on the flow fi el d in vaned diffuser of a centrifugal fan has been conducted using Laser Doppler Velocimeter (LDV).

In this paper, the numerical investigation on vane diffuser is given under the condition of basic stage of centrifugal compressor using Fine/Turbo flow analysis software.

A numerical simulation is preformed by replacing vane diffuser with vaneless diffuser with the other boundary conditions unchanged.

Based on the vane diffuser of small flowrate model stage in centrifugal compressor,the influence of vane diffuser on the performance of model stage is studied through changing the location and length of vane and the analysis of calculation results obtained by the individual numerical simulation.

Based on theory of thin-airfoil,an equation,calculating unsteady force on diffuser vanes with the impeller viscous wakes is established by the model which is described as a group of continuous eddy distribution instead of each blade and equi-splitting array in c.