SIMULATION MODEL IN NUMERICAL OPTIMIZATION OF CENTRIFUGAL COMPRESSOR IMPELLERS
The article deals with choosing the parameters for the grid models and the computational domain while solving problems on optimizing the impellers of centrifugal compressors’s via computational fluid dynam- ics. In solving such problems, searching and applying the optimal parameters of the grid model, the computational domain, and the solver settings provides a high accuracy of the simulation with the most effective and productive use of machine time. The study was conducted in the Numeca Fine/Turbo program complex for the Spalart-Allmaras and Shear Stress Transport turbulence models on the ex- ample of two impellers: high-pressure with ѱт =0,71 and Ф = 0,064, and low-pressure with ѱт =0,43 and Ф = 0,06. It is established that the choice of the optimum parameters can significantly reduce the time required for obtaining a converging solutions and facilitates the further solution of optimization problems.