数字发动机技术现状、挑战及关键问题

Digital Engine Technology Status,Challenges and Key Issues

航空发动机设计仿真技术逐渐向综合化、集成化发展,同时伴随着系统工程方法论的完善,航空发动机领域的数字化变革方兴未艾。本文综述了航空发动机数字化概念、现状、需求和关键技术问题等内容,希望为我国航空发动机数字化变革提供参考和支持。面向航空发动机复杂性本质,分析了基于模型的系统工程、数字孪生、数字主线的概念和实质内涵,发展了数字发动机定义。针对技术趋势和挑战,总结了国内外数字发动机相关用例和发展现状,论述模型算法库、通用平台、数据连通和处理、耦合集成仿真技术、数据分析和决策等需要开展的工作。针对数字化转型的关键技术问题,讨论学科仿真集成方法、系统模型和学科模型的连通方法、数字孪生建模方法的国内外相关研究内容和方向。数字发动机的思路和具体研究内容可为后续规划和建设航空发动机数字孪生系统提供基础。

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.