CFD Investigations on Supersonic Ejectors for Refrigeration Applications

摘要

This paper presents numerical results of a supersonic ejector for refrigeration applications.One of the interesting features is that the current model is based on the NIST properties for the R142b refrigerant:to the authors knowledge,it is the first paper dealing with a local CFD model which takes into account shock-boundary layer interactions in a real refrigerant.The numerical results put demonstrate the crucial role of the secondary nozzle for the mixing rate performance.In addition,these results point out the need of an extensive validation of the turbulence model,especially in the modeling of the off-design mode.