Simulation Analysis of Cyclic Characteristics of Ejectors for PEMFC Systems

Abstract:

Based on the Соколов ЯЕ ejector design method, the geometric parameters of ejectors were determined by the three kinds of selected working condition. Each ejector computational fluid dynamics (CFD) model was established in ANSYS/Fluent .The ejector cycle test model was established in Simulink, based on which the CFD model was used to carry out the simulation under six sets of load currents. Twodimension cubic spline interpolation was used to obtain the twodimension characteristic curve of the ejectors and primary fluid constraints were calculated. Finally, twoejector anode recirculation system was proposed. The simulation results show that the proposed twoejector system can meet the requirement of 0~300 A operating condition with a better circulation effect.

Key words:fuel cell; proton exchange membrane; ejector; Е.Я.Соколов ejector design method; computational fluid dynamics (CFD); cycle characteristics