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Title:
STRUCTURE OF COOLING AIR FEED SYSTEM
Document Type and Number:
Japanese Patent JPS54158509
Kind Code:
A
Abstract:
A cooling air supply arrangement for a gas turbine engine comprises a rotor, a source of cooling air at a high supply pressure, a first passage adapted to transmit a first flow of said cooling air to a first area of the rotor and to reduce its pressure to a first pressure lower than said high supply pressure, and a second passage adapted to transmit a second flow of said cooling air to a second area of the rotor and to reduce its pressure to a second pressure lower than the first pressure. A seal is provided to resist flow of cooling air from said first to said second area, and in order to reduce the leakage through the seal it incorporates part of the second passage including nozzles oriented to direct at least part of said second flow against the leakage flow. In this way the leakage is reduced and simultaneously the pressure of the second flow is reduced.

Inventors:
DEEBITSUDO OMURII DEEBIIZU
Application Number:
JP6254979A
Publication Date:
December 14, 1979
Filing Date:
May 21, 1979
Export Citation:
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Assignee:
ROLLS ROYCE
International Classes:
F01D5/08; F01D11/04; F01D5/18; F02C7/18; (IPC1-7): F01D5/08; F02C7/18
Domestic Patent References:
JPS5177708A1976-07-06