Assessment of turbulence models for the prediction of large-scale tip vortices in an axial compressor rotor

Six turbulence models frequently used in compressor aerodynamics, including the Mixing-Length model, the Spalart-Allmaras model, the standard k-ε model, the SST k-ω model, the v²̄-f model, and the Reynolds stress model, have been employed in the detailed numerical investigations of a low-speed large-scale axial compressor rotor, whose tip flows have been measured in detail with Stereoscopic Particle Image Velocimetry, to assess the predictive capabilities of the turbulence models for large-scale vortices in the tip region of the rotor. The flow fields in the rotor tip have been also further analyzed based on the numerical results combined with the experimental results.