Application of Through-Flow Calculation to Designand Performance Prediction of Centrifugal Compressor

[摘要] A computer code predicting the flows through the centrifugal compressor with the radial vaneless diffuser was developed and applied to investigate the detailed flowfields, i.e.,secondary flows and jet-wake type flow pattern in design and off-design conditions. Variousparameters such as slip factors, aerodynamic blockages, entropy generation and two-zonemodeling which are widely used in design and performance prediction, were discussed.A control volume method based on a general curvilinear coordinate system was used tosolve the time-averaged Navier–Stokes equations and SIMPLER algorithm was usedto solve the pressure linked continuity equation. The standardk-εturbulence model was used to obtain the eddy viscosity. Performance of the code was verified using the measured data for the Eckardt impeller.

[学科分类] 力学，机械学