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This paper investigates stall inception in centrifugal compressor vaned diffusers, focusing on the mechanisms behind short-wavelength stall precursors. It combines unsteady 3D RANS simulations with experimental data to analyze the onset of instability and identifies the role of spanwise flow non-uniformity and swirling flow in the diffuser. The findings suggest that spike stall inception in vaned diffusers occurs independently of blade-tip leakage flows common in axial machines.
- Author
- mihai borzea
- Language
- EN