Abstract
The effects of secondary flow in a turbine rotor on its downstream flow field are presented in this paper. We performed a RANS simulation to investigate complex flow phenomena in a turbine rotor. The simulation showed that the passage vortex, which was generated by the secondary flow inside the rotor, drastically developed on the hub side while the horseshoe vortex was not clearly identified at the leading edge of the rotor because of the skewed boundary layer. The passage vortex governed the flow field still at the downstream of the rotor, which could result in a negative impact on the flow field in the next stage.
