This paper introduces aerodynamic simulations and
structural analysis of a high speed centrifugal compressor at
the stall condition. Simulations were performed for the
compressor when the air injection control is applied and the
results of the controlled compressor were compared to that for
the uncontrolled compressor. The case of the compressor with
air injection control was discussed in details in a previously
published paper done by the authors of the current presented
work. It was found that the stall effect is maximized at the
impeller exit and at the vaneless area due to the strong
pressure and velocity fluctuations resulting from the random interaction between the main flow and the tip leakage flow.
Results showed that the forces and moments for the controlled
compressor case are lower than those for the uncontrolled
compressor case during stall. Results showed also that the
maximum deformation of the blades near the tip region is
located at the area corresponding to end of the axial blade
profile up to the start of radial blade profile.
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.