Aero-engine design and simulation technologies thrive in metasynthesis and integration. Meanwhile

with the improvement of system engineering methodology

the digital revolution in aero-engine field is in the ascendant. The concept

current situation

demand and key technical issues of aero-engine digitization are reviewed in the hope of providing reference and support for chinese aero-engine digital transformation. Facing the complex essence of aero-engine

the concept and connotation of model-based system engineering

digital twin and digital thread are analyzed

and the definition of digital engine is further developed. The use cases and development status of digital engine at home and abroad are summarized and the work needing to be done including model and algorithm library

general platform

data connectivity and processing

coupled and integrated simulation technologies

data analysis and decision making is discussed

according to the technical trends and challenges. Aiming at the key technical problems of digital transformation

the relevant research content and direction of the disciplinary simulation integration method

the communication method of system model and discipline model

and the digital twin modeling method are discussed. The idea and specific research content of digital engine can provide the foundation for subsequent planning and construction of aero-engine digital twin systems.