Numerical Efficiency Evaluation of a High Pressure Ratio Screw Compressor

In this scientific paper, a numerical analysis was performed to determine the performances of an oil-injected screw compressor operating at high pressures. For this analysis was defined the computing domain composed from five subdomains, two rotors represented by the male rotor and the female rotor and three stators representing the suction side, pressure side and oil inlet subdomain. To generate the meshes for rotating domains we use the TwinMesh commercial software, dedicated software for positive-displacement volumetric machines. For flow modeling the Ansys CFX CFD software with The SST turbulence model was used. The analysis was unsteady and a subroutine done in Fortran was used for grids import. The results of this analysis are evaluated by looking at gas and oil massflow variations, power consumption and torque value for each rotor.