Design Optimization of a High-Speed Twin-Stage Compressor for Next-Gen Aircraft Environmental Control System

Abstract The environmental control system (ECS) is the largest auxiliary power consumer, i.e., around 75% of non-propulsive power, among aircraft subsystems. adoption a novel ECS architecture, based on an electrically-driven vapor compression cycle system, can enable twofold increase coefficient performance at cruise conditions, as compared to conventional air machine. core this technology high-speed, miniature centrifugal compressor, consisting two impellers mounted in back-to-back configuration, and running gas bearings, operating with refrigerant. fluid dynamic design optimization twin-stage be installed test rig under realization Delft University Technology, documented paper. First, scaling analysis for compressor extended provide guidelines machines. Then, multi-objective conceptual performed by resorting in-house reduced-order model (ROM), coupled genetic algorithm. structural integrity optimal are assessed means hybrid framework, encompassing computational dynamics ROMs, finite element analysis. results show that it possible target application, featuring average efficiency higher than 70%, maximum ratio exceeding 9, range 0.27 rotational speed, despite detrimental effects motor cooling size.