Turbine disc ingress prevention method and apparatus

Details Turbine disc ingress prevention method and apparatus Turbine disc ingress prevention method and apparatus

1996-12-13

1998-06-02

Kwon, John T.

Rotary kinetic fluid motors or pumps

With passage in blade, vane, shaft or rotary distributor...

416914, F04D 2938

Patent

active

057590125

ABSTRACT:
The invention disclosed and taught herein teaches method and apparatus for restricting the ingress of hot combustion gases into the turbine disc plenum of a gas turbine engine as the hot gases flow from a turbine nozzle assembly and into the turbine blades. A jet of engine cooling air is injected into the wake region immediately behind and down stream of the nozzle assembly's stator vanes thereby reducing the static pressure recovery otherwise occurring within the wake region. Thus, a lessor amount of buffering air is required within the turbine disc plenum to prevent the ingress of hot gases thereby resulting in an increased efficiency of the engine's cooling air delivery system and over all engine performance.

REFERENCES:
patent: 4111596 (1978-09-01), Amana et al.
patent: 5135354 (1992-08-01), Novotny
patent: 5403156 (1995-04-01), Arness et al.
patent: 5511945 (1996-04-01), Glezer et al.
patent: 5609466 (1997-03-01), North et al.

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