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Gas turbine engine geometry control

  • US 3,981,140 A
  • Filed: 06/23/1975
  • Issued: 09/21/1976
  • Est. Priority Date: 06/23/1975
  • Status: Expired due to Term
First Claim
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1. A method of operating a gas turbine engine including a compressor, combustion apparatus, and a turbine driving the compressor, and having variable compressor and turbine geometry, the method comprisingvarying concurrently the flow areas through the compressor and the turbine as a function of engine power level request in normal load-powering operation of the engine to vary the flow capacity of the engineand closing the compressor variable geometry while opening the turbine variable geometry to spoil the power output of the engine for load-braking operation of the engine.

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