SIMULATION MODEL IN NUMERICAL OPTIMIZATION OF CENTRIFUGAL COMPRESSOR IMPELLERS

Energetics
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Abstract:

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.