Simulation of a flow in a return channel with a deswirl cascade using advanced turbulence modelling

A study of different low-Reynolds number turbulence models used for a highly three dimensional return channel with a deswirl cascade is described. A comparison is made between Chien's k - epsilon model, Chien's model with a rotational correction, an explicit algebraic Reynolds-stress model by Gatski et al., and a full Reynolds-stress closure by Speziale et al. Anisotropic models give better results than isotropic ones. However, in some regions none of the models simulate the flow field correctly.