Study the Effect of Changing Inlet Area Ratio of a Supersonic Pressure-Exchange Ejector

Abstract

This paper will explain the structure of the flow induction in a non-steady supersonic fluid. The ratio of the inlet area to the inlet area is varied and the analyses related to the induction processes are studied. It is found that the ratio of the inlet area -primary/secondary- is about 30% to produce the desired flow induction in a three- dimensional, non-steady, supersonic pressure exchange ejector. This ejector is used for compression applications. 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 related to the inlet area ratio of fluid to fluid. The results will show the correct inlet area ratio that is capable of producing the desire effect of the flow induction in a three-dimensional supersonic, non- steady, viscous flow. Results including contour plots of total enthalpy and static pressure will demonstrate that inlet area ratio is a critical element in flow induction mechanism. Results of velocity vectors of different inlet area ratios will show the structure of flow induction mechanism in a complex three-dimensional conical surface.