HM7B Simulation with ESPSS Tool on ARIANE 5 ESC-A Upper Stage

ESPSS tool project which was proposed, coordinated and funded by ESA is dedicated for launcher stage and space vehicle functional performance analysis. The main tool developer is EAI. The S/W development is concerned with setting up a common European platform for propulsion system simulation. Such a common platform is identified as crucial in order to strengthen the European company’s competence in propulsion system modelling, which is important in case of a prime role responsibility or general industrial and research institute competence. ESPSS is proposed as a starting point and a framework for continuous cooperation on space propulsion systems between European industries working on such kind of systems. The paper will present for feasibility demonstration a gas generator engine cycle application using exemplarily A5 ESC-A HM7B engine. The set-up of the model is based on HM7B definition file and takes as a 1 approach the engine steady state conditions for adjustment of the main input parameter sets. The steady state conditions of H10-III engine were taken as reference. Part of the physical model formulation of its incorporated components, its schematic, data initialisation and simulation results obtained will be shown. The simulation results will be compared to respective flight measurement data of an A5 ESC-A upper stage.