초록 ▼

A gas turbine engine includes a turbomachinery core operable to generate a flow of pressurized combustion gases at a variable flow rate, while maintaining a substantially constant core pressure ratio; a rotating fan disposed upstream of the core, the fan adapted to extract energy from the core and g

A gas turbine engine includes a turbomachinery core operable to generate a flow of pressurized combustion gases at a variable flow rate, while maintaining a substantially constant core pressure ratio; a rotating fan disposed upstream of the core, the fan adapted to extract energy from the core and generate a first flow of air which is compressed at a first pressure ratio; and at least a first bypass duct surrounding the core downstream of the fan adapted to selectively receive at least a first selected portion of the first flow which is compressed at a second pressure ratio lower than the first pressure ratio, and to bypass the first selected portion around the core, thereby varying a bypass ratio of the engine. The fan is adapted to maintain a flow rate of the first flow substantially constant, independent of the bypass ratio.

대표청구항 ▼

What is claimed is: 1. A gas turbine engine, comprising:(a) a first turbomachinery core;(b) a second turbomachinery core adjacent to the first core;(c) a low pressure turbine disposed downstream of the first and second cores and in flow communication with at least one of the first and second cores;(

What is claimed is: 1. A gas turbine engine, comprising:(a) a first turbomachinery core;(b) a second turbomachinery core adjacent to the first core;(c) a low pressure turbine disposed downstream of the first and second cores and in flow communication with at least one of the first and second cores;(d) a rotating fan disposed upstream of the first and second cores and in mechanical communication with the low pressure turbine;(e) at least one inlet control flap disposed downstream of the fan and upstream of the first and second cores, the at least one inlet control flap having at least two positions, wherein:a first position permits flow communication between the fan and the first core and prevents flow communication between the fan and the second core; anda second position permits flow communication between the fan and the second core and prevents flow communication between the fan and the first core; and(f) at least one outlet control flap disposed downstream of the first and second cores and upstream of the low pressure turbine, the at least one outlet control flap having at least two positions, wherein:a first position permits flow communication between the first core and the low pressure turbine; anda second position permits flow communication between the second core and the low pressure turbine.