Abstract
Three-dimensional and unsteady flow phenomena due to the breakdown of the tip leakage vortex in a transonic axial compressor rotor NASA Rotor 37 have been investigated by an unsteady RANS simulation with a two-equation (k-ω) turbulence model. The simulation shows that the bubble-type breakdown of the tip leakage vortex is caused by the interaction between the tip leakage vortex and the shock wave. The interaction gives rise to self-sustained flow oscillation even at near-design point.
