The paper discusses an algebraic intermittency model for prediction of bypass and separation-induced boundary layer transition. The transition model is coupled with a k-omega turbulence model. The transition model uses only local variables and is tuned for turbomachinery flows. For bypass transition, two effects in an attached pre-transitional boundary layer are modelled: damping of small-scale disturbances induced by the free stream and breakdown of the near-wall perturbed flow with generation of fine-scale turbulence. For separated flow, the model describes breakdown of a laminar free shear layer
