Aerodynamic Performance Analysis of Supercritical Carbon Dioxide Centrifugal Compressor Based on Non-equilibrium Phase Transition
As the core power component of the supercritical carbon dioxide(SCO2)Brayton cycle,accurate analysis of the aerodynamic thermodynamic performance and loss characteristics of the compressor under near-critical conditions is crucial for the efficient operation of the cycle.The com-pressor is prone to condensation when working near the critical point,and the condensation process is non-equilibrium.In this paper,an SCO2 non-equilibrium condensation model based on the Euler-Euler source term is established and compared with the equilibrium condensation model to evaluate the impact of the non-equilibrium condensation process on the aero-thermodynamic performance of the SCO2 centrifugal compressor.The results show that the non-equilibrium condensation model is more accurate in predicting efficiency,and non-equilibrium condensation will cause the compressor to enchance the inlet flowrate and enter near-surge conditions faster.
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维普
