Generator cooling system for turbo-fan engine

A system for cooling a generator and an electric power cable connected to the generator, the generator and the electric power cable being disposed in a hot section of a turbo-fan engine, the system comprising:

• a junction box;
• a bypass air duct that supplies, to the junction box, air extracted from a portion of a bypass flow path of the turbo-fan engine on a side further downstream than a fan outlet;
• a core air duct that supplies, to the junction box, air extracted from a portion of a core flow path of the turbo-fan engine on a side further upstream than a compressor outlet;
• and
• a cooling air duct that extends from the junction box to a space in which the generator is accommodated and accommodates the electric power cable inside the cooling air duct,
• wherein valves that are able to be independently controlled to open and close are provided at downstream ends of the bypass air duct and the core air duct.