Detailed Simulations of a Three-Stage Supercritical Carbon Dioxide Axial Compressor with a Focus on the Shrouded Stator Cavities Flow

This paper describes the findings of detailed simulations performed to investigate impact seal teeth cavity leakage flow on aerodynamic and thermal performance a three-stage supercritical CO2 axial compressor. The study compares shrouded stator configuration (with cavities) cantilevered (without highlight their differences. High-fidelity computational fluid dynamics were using non-linear harmonic (NLH) mixing plane assumptions, considering various possible rotor/stator interface configurations for calculations. key parameters each case compared, best-performing selected further analysis. individual stage are also examined compared between configurations. It was observed that in case, enters downstream trailing edge gets entrained into primary upstream stator, leading boundary layer changes at hub degradation rotor performance. Vortical structures wells, which tended change angles around region, thereby affecting velocity distribution, resulting slight deterioration compressor Additionally, examines windage heating due shear work from rotating walls, including surface. amount done corresponding rise temperature quantified, tabulated, with simple analytical model, showing good agreement them and, hence, validating numerical approach used.