超臨界二酸化炭素の遠心圧縮機内部流動シミュレーション

抄録

Supercritical CO2 has been employed as an effective working fluid in Brayton cycles. Compressors in supercritical CO2 Brayton cycles are primary components that work beyond the critical pressure and temperature. We have developed the numerical method for supercritical fluid flows with the equation of state for real gas defined in REFPROP. In this study, actual Centrifugal compressor flows are investigated under the subcritical and supercritical pressure conditions by our numerical method. The results of three-dimensional unsteady state simulations are compared with each other.