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ACOUSTIC MEASUREMENT SYSTEM INCORPORATING A TEMPERATURE CONTROLLED WAVEGUIDE

  • US 20170016396A1
  • Filed: 07/16/2015
  • Published: 01/19/2017
  • Est. Priority Date: 07/16/2015
  • Status: Active Grant
First Claim
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1. A measurement system for combustion gas in a gas turbine engine based on propagation of an acoustic signal while the gas passes through a measurement region in the engine, the system comprising:

  • a waveguide having first and second ends and a cavity extending between the first and second ends of the waveguide, the first end configured to adjoin the flow path for injection of the acoustic signal into the measurement region; and

    an acoustically transmissive physical barrier positioned between a portion of the waveguide and the measurement region to prevent movement of the combustion gas from the measurement region into the waveguide while permitting transmission of the acoustic signal from the waveguide into the measurement region.

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