| 摘要 |
A dual mode gas turbine engine includes a dual mode fan and low pressure compressor section upstream of radially inner and outer gas generators which include radially inner and outer combustors disposed in radially inner and outer working fluid flowpaths, respectively, in fluid flow communication with the dual mode fan and low pressure compressor section. An outer low pressure turbine downstream of the outer combustor is drivingly connected to the fan and low pressure compressor section. A common exhaust duct downstream of the inner and outer gas generators is in fluid flow communication with the flowpaths. The outer low pressure turbine may include outer low pressure turbine blades mounted on a rotatable turbine shroud connected to a low pressure rotor which includes the fan and low pressure compressor section. Inner low pressure turbine blades on the low pressure rotor and downstream of a diffusing duct extend across the inner working fluid flowpath and connect the turbine shroud to the low pressure rotor.
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