The Measurement of the Transient Temperature of Gas by Laser Interferometry

Yoshisuke Hamamoto, Eiji Tomita, Tadayoshi Okada

Research output: Contribution to journalArticlepeer-review


In order to measure the transient temperature of gas, a laser interferometry was applied. When the density of the gas changes, the effective optical path length of the test beam changes with a corresponding change of the refractive index. So the change of temperature of gas can be determined by measuring the pressure and the shift of interference fringes with a pair of photo-transistors. In this study, examples of the temperature change measurement of the gas due to only the expansion, to the compression and expansion with a piston motion, and to the compression with flame propagation were described. It is recognised that interferometry is a useful method for the measurement of the transient temperature of the gas in the field of combustion research.

Original languageEnglish
Pages (from-to)3798-3802
Number of pages5
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Issue number496
Publication statusPublished - 1987
Externally publishedYes


  • Combustion
  • Internal Combustion Engine
  • Laser Interferometry
  • Measurement
  • Temperature Measurement
  • Unburned Gas Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering


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