1711 Numerical Simulation on Unsteady Behavior of Tip Leakage Flow in a Transonic Axial Compressor Rotor at Near-Stall Condition
Details
The purpose of this study is to better understand the unsteady behavior of tip leakage flow in axial compressor rotors at near-stall condition, which leads to the rotating disturbance in stall inception. DES (Detached Eddy Simulation), which has a potential to accurately predict the unsteadiness of separation and vortices to be appeared in compressors at near-stall, was applied to this simulation in a transonic axial compressor rotor (NASA Rotor 37). The result was compared with that of RANS simulation. DES showed that the tip leakage vortex fluctuated with time due to the vortex breakdown, but it happened at a little higher mass flow rate than the near-stall condition of the experiment.
