Abstract
This paper uses ANSYS-CFX to simulate a 100kW supercritical CO2 radial inflow turbine. The internal vortex structure of the nozzle is identified based on Q-criterion and helicity. The internal flow loss of the nozzle is quantified based on Kock-Herwig’s theory of entropy production. Finally, the mechanism of internal loss formation in the nozzle is analyzed by combining the distribution law of entropy production. The analysis of the internal flow loss of the nozzle shows that the flow loss inside the supercritical CO2 radial inflow turbine nozzle is mainly caused by turbulent dissipation, and the turbulent pulsation induced by viscous shear stress plays a dominant role in this process.
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