Development of simulation methods and tools to predict the idle and sub-idle behavior of future large Very High Bypass Ratio geared civil turbofan engines.

PROTEUS project is linked to Work Package 6 (WP6) (and WP5) of the Engines ITD focusing on the Very High Bypass Ratio (VHBR) geared turbofan engine demonstrator programme. Its aim is to develop a capability to predict and understand the idle and sub-idle performance and operability of large VHBR geared turbofan engines. The work will focus on the characterization of the performance of key engine components at idle and sub-idle conditions using high-fidelity models and simulations along with validation against experimental data provided by the Topic Manager.

The components to be studied include the core compressors ((Intermediate and High-Pressure Compressors IPC and HPC), staged lean-burn combustor, low pressure system (including the low speed fan, Power Gearbox (PGB) and turbines), and heat management and secondary air systems. Results from high-order simulations will be reduced into appropriate 0D (or 1D) component characteristics and integrated within a toolset developed in the Numerical Propulsion Simulation System (NPSS) environment for rapid whole-engine performance analyses.