Air cooled turbine for a gas turbine engine

Details Air cooled turbine for a gas turbine engine Air cooled turbine for a gas turbine engine

1979-10-16

1982-09-07

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural distributing means immediately upstream of runner

415115, F01D 518

Patent

active

043481574

ABSTRACT:
An air cooled turbine which has cooling air provided through pre-swirl nozzles into an annulus formed between radially inner and outer seals and then into cooling air inlets to the turbine blading, has leakage air deflector means to prevent the leakage flow from the inner to outer seal interfering with the cooling air flow. The deflector means may comprise leakage flow inlets adjacent the inner seal, channels extending radially and cooperating with the turbine rotor to provide passages for the leakage flow to a location radially outboard of the cooling air inlets to the turbine blading, and open portions through which the cooling air can flow to the cooling air inlets. The channel outlets of the deflector may be arranged so that some of the leakage flow can be directed to cool a less critical part of the turbine blading the remaining leakage flow being directed radially outboard of the cooling air inlets to a more critical part of the turbine blading which are arranged to receive the normal cooling air flow.

REFERENCES:
patent: 2988325 (1961-06-01), Dawson
patent: 3635586 (1972-01-01), Kent
patent: 3663118 (1972-05-01), Johnson
patent: 3791758 (1974-02-01), Jenkinson
patent: 3826084 (1974-07-01), Branstrom et al.

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