NASA Technical Reports Server (NTRS) : Acoustic pdf

NASA Technical Reports Server (NTRS) : Acoustic_bookcover

NASA Technical Reports Server (NTRS) : Acoustic

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Internal gas temperature is one of the most fundamental parameters related to engine efficiency and emissions production. The most common methods for measuring gas temperature are physical probes, such as thermocouples and thermistors, and optical methods, such as Coherent Anti Stokes Raman Spectroscopy (CARS) or Rayleigh scattering. Probes are relatively easy to use, but they are intrusive, their output must be corrected for errors due to radiation and conduction, and their upper use temperature is limited. Optical methods are nonintrusive, and they measure some intrinsic property of the gas that is directly related to its temperature (e.g., lifetime or the ratio of line strengths). However, optical methods are usually difficult to use, and optical access is not always available. Lately, acoustic techniques have been receiving some interest as a way to overcome these limitations

  • Creator/s: NASA Technical Reports Server (NTRS
  • Date: 4/1/1999
  • Year: 1999
  • Book Topics/Themes: NASA Technical Reports Server (NTRS), COMBUSTION PRODUCTS, EXHAUST GASES, GAS TEMPERATURE, RAMAN SPECTROSCOPY, TEMPERATURE MEASUREMENT, SOUND DETECTING AND RANGING, ERRORS, EXHAUST EMISSION, GAS TURBINES, JET ENGINES, THERMISTORS, THERMOCOUPLES, Fralick, Gustave C

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