Computational Analysis of Flow Inside a Diffuser of Three-Dimensional Supersonic Non-Steady Ejectors

Abstract

The work to be presented herein is a Computational Fluid Dynamics investigation of the complex fluid mechanisms that occur inside a non-steady, three-dimensional, supersonic pressure exchange ejector, specifically with regard to the pressure exchange mechanisms and the induction processes between a “driving” primary fluid and a “driven” secondary fluid and how this is affected by the diffuser surface. The results will show that this ejector is capable of producing the desire affect of the flow induction in a three-dimensional supersonic, non-steady, viscous flow. Results of contour plots of total pressure and static pressure demonstrate that the flow inside the diffuser is a critical element in flow induction mechanism, especially when a pressure recovery is needed. Results of velocity vectors will show the structure of flow induction mechanism in a complex three-dimensional conical surface.