总结了国内外变循环涡扇冲压组合发动机的发展现状，对比分析了有/无能量传递构型的变循环涡扇冲压组合发动机的工作原理及优缺点。提炼了变循环涡扇冲压组合发动机的关键技术，包括总体性能仿真技术、高速宽工况风扇设计技术、加力/冲压燃烧室设计技术、热管理系统设计技术以及模态转换设计技术。基于国内需求和相关技术研究现状，给出了变循环涡扇冲压组合发动机后续重点研究方向的建议，包括发动机总体性能设计与仿真工具、发动机多设计点多学科耦合设计方法、发动机热管理系统设计与仿真建模以及关键部件的设计与试验。

The development status of variable cycle turbofan-ramjet (VCTR) engines at home and abroad was summarized, and the operating principles, advantages and disadvantages of two typical configurations of VCTR engines, with or without energy transfer between the turbine engine and the ramjet flowpaths, were comparatively analyzed. The key technologies of VCTR engines are defined and discussed, including engine performance design and simulation technology, high-speed and wide-range fan design technology, after/ram burner (hyperburner) design technology, thermal management system (TMS) design technology, and mode transition design technology. Based on the domestic need and related research status for the VCTR engines, the following issues are proposed to be further investigated: VCTR engine performance design and simulation tool, multi-design points and multi-disciplinary coupling design methodology, TMS design and modeling, and design and test of critical components.

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国家自然科学基金（51876176；51906214）；民机专项科研项目。