Updating the pump and injector plate components of the ESPSS library in view of transient analysis of LOx/Methane engines

This work summarizes some of the activities carried out by Sapienza University of Rome, Avio S.p.A. and Empresarios Agrupados Internacional in the framework of the EVACPRO project, an ESA funded activity aiming at improving EcosimPro/ESPSS capabilities, with a focus on transient simulations of LOX/LCH4 engines. The pump and injector plate components have been significantly improved. The injector pressure loss model has been updated to take into account the effects of injector geometry, swirl and distributed losses. A new thermal layout has been proposed, allowing for a better prediction of the injection plate temperature. The pump model has been extended to represent the most relevant fluid and thermal paths. A new thermal layout has been inserted, representative of the main thermal resistances and capacitances. The results of the proposed models have been compared with experimental data, showing promising results.