Ventilation structure of core chamber of turbofan engine having large bypass ratio and ventilation method therefor

Abstract

A ventilation structure of a core chamber of a turbofan engine having a large bypass ratio, said structure comprising: an outer bypass wall surface (), a core chamber wall surface () and a core casing (). An outer bypass flow channel () is formed between the outer bypass wall surface () and the core chamber wall surface (). A core chamber () is formed between the core chamber wall surface () and the core casing (). An air intake annular cavity () is provided in the core casing and is located at the upstream position. The air intake annular cavity () is used to put the outer bypass flow channel () and the core chamber () in communication. An exhaust grille () is further provided on the core chamber wall surface () and is located at a tail position.