CARINS : A versatile and flexible tool for engine transient predictionDevelopment status

摘要

CARINS is a new versatile and flexible tool forsimulation of liquid propellant rocket enginesystems transients. This kind of numericalsimulation can reduce drastically designdevelopment costs and checking capacities.The goal of the project is to give to engineers andresearch teams a new powerful tool for reproducingtime evolution of physical parameters whichcharacterise the propulsion system behaviour forspace launcher, or only part of it, during all themission phases (start-up and shutdown transients,chill down phase, operating point modification, …).This project was initiated four years ago by CNES,in partnership with ONERA, and it involves severallaboratories. The first version will be qualified insummer 2004.For this project, CNES included two extra itemswhich make uniqueness of CARINS : first, the toolmust be an open software and second, the softwaremust be free of licensed-tools. That is why wechoose a symbolic manipulation offered byComputer Algebra System and numerical analysisfor computing the response of a dynamical system.First applications are presented specially onARIANE 5 stage pressurisation sub-systems, VINCIhydrogen turbo pump axial equilibrium system,HM7 and AESTUS engine transient andVULCAIN combustion components.