Multi-shaft turbojet propulsion unit - has extra combustion chamber between high and low pressure turbines operated when at full speed and entry temp.

摘要

The multi-shaft turbo-jet propulsion unit comprises, in sequence a low-pressure compressure (1), a medium and/or high-pressure compressor (3), a high-pressure combustion chamber (5), a high-pressure turbine (6), and a medium and/or low-pressure turbine (8). The turbines are coupled with their corresponding compressors via mechanically independent rotor systems. Between the high-pressure turbine (6) or the medium pressure turbine and the low-pressure turbine (8), there is an additional combustion chamber (7) with controllable temp. The high-pressure chamber (5) and the additional chamber (7) can be lit in sequence, the additional chamber not being lit until the gas generator has reached full speed and full turbine entry temp.