Bleed air and hot section component cooling air system and method

  • US 9,222,411 B2
  • Filed: 06/29/2012
  • Issued: 12/29/2015
  • Est. Priority Date: 12/21/2011
  • Status: Active Grant
First Claim
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1. A combined bleed air and hot section component cooling air system for a gas turbine engine, the combined bleed air and hot section component cooling air system comprising:

  • a high-pressure bleed air line configured to receive high-pressure bleed air from a high-pressure stage of a compressor;

    a first precooler operatively connected to the high-pressure bleed air line to receive at least some of the high-pressure bleed air, transfer heat from the high-pressure bleed air to ambient air, and discharge cooled high-pressure bleed air;

    a high-pressure discharge line operatively connected to the first precooler to receive the cooled high-pressure bleed air;

    a first pressure regulator in the high-pressure discharge line, the first pressure regulator being configured to receive at least some of the cooled high-pressure bleed air and discharge pressure-regulated cooled bleed air;

    a pneumatic systems supply line operatively connected to the high-pressure discharge line downstream of the first pressure regulator to receive the pressure-regulated cooled bleed air; and

    a hot section component cooling air line operatively connected to the high-pressure discharge line upstream of the first pressure regulator and configured to convey at least some of the cooled high-pressure bleed air to a hot section component for use as hot section component cooling air, further comprisingan intermediate-pressure bleed air line configured to receive intermediate-pressure bleed air from an intermediate stage of the compressor and supply the intermediate-pressure bleed air to the first precooler, the first precooler being configured to receive the intermediate-pressure bleed air, transfer heat from the intermediate-pressure bleed air to ambient air, and discharge cooled intermediate-pressure bleed air;

    an intermediate-pressure discharge line operatively connected to the first precooler to receive the cooled intermediate-pressure bleed air;

    a second pressure regulator in the intermediate-pressure discharge line, the second pressure regulator being configured to receive at least some of the cooled intermediate-pressure bleed air and discharge pressure-regulated cooled bleed air to the pneumatic systems supply line.

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