Investigation and Perfection of Centrifugal Compressor Stages by CFD Methods

Stator elements «Vane diffuser + crossover + return
channel» of stages with different specific speed were investigated by
CFD calculations. The regime parameter was introduced to present
efficiency and loss coefficient performance of all elements together.
Flow structure demonstrated advantages and disadvantages of design.
Flow separation in crossovers was eliminated by its shape
modification. Efficiency increased visibly. Calculated CFD
performances are in acceptable correlation with predicted ones by
engineering design method. The information obtained is useful for
design method better calibration.

• Y. Galerkin
• L. Marenina

• Vane diffuser
• return channel
• crossover
• efficiency
• loss coefficient
• inlet flow angle.

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