Method and apparatus for boosting ram airflow to an ejection noz

Power plants – Reaction motor – Method of operation

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60262, 60266, F02K 136

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active

054351278

ABSTRACT:
An ejecting exhaust nozzle in a gas turbine engine includes a convergent section, a divergent section, extending downstream from the convergent section, and an ejector for ejecting an airflow into the core airflow is fed by a boost pump. The boost pump includes a flow mixer with a boost plane wherein a fan airflow is injected into a ram airflow and then mixed in a mixing section extending downstream from the boost plane. Varying the fan airflow to boost the ram airflow to control a boosted ram airflow pressure allows ejector operation throughout the flight envelope of the gas turbine engine.

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Patent Application S/N 07/787,869, filed Nov. 5, 1991 (our 13LN-1944) Mayer, et al., "Cooling Air Transfer Apparatus for Aircraft Gas Turbine Engine Exhaust".

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