Variable cycle engine core engine with variable working modes

The invention provides a variable cycle engine core engine with variable working modes, comprising: a core engine comprising an air inlet part and a main body part; the outer duct is parallel to the core machine, the air inlet part can be communicated with the inlet end of the outer duct through a mode selection valve, the main body part is communicated with the middle of the outer duct through a deflation device, and an outer duct exhaust device is arranged at the outlet end of the outer duct. Through opening and closing of the mode selection valve and cooperation with adjustment of the deflation device and the outer culvert exhaust device, switching of a single outer culvert working mode and a double outer culvert working mode of the core engine can be achieved, and the bypass ratio can be greatly adjusted. 本发明提供一种工作模式可变的变循环发动机核心机，包括：核心机，包括进气部分和主体部分；外涵道，与核心机平行设置，进气部分能够通过模式选择阀与外涵道的入口端部连通，主体部分通过放气装置与外涵道的中部连通，外涵道的出口端设置有外涵排气装置。通过模式选择阀的打开与关闭，同时配合放气装置与外涵排气装置的调节，可实现核心机单、双外涵两种工作模式转换，以及涵道比的大幅调节。