Quantitative measurement of temperature in oxygen enriched CH 4 /O 2 /N 2 premixed flames using Laser Induced Thermal Grating Spectroscopy (LITGS) up to 1.0MPa

Akihiro Hayakawa, Tomohisa Yamagami, Kiyonori Takeuchi, Yasuhiro Higuchi, Taku Kudo, Steven Lowe, Yi Gao, Simone Hochgreb, Hideaki Kobayashi

Research output: Contribution to journalArticlepeer-review

Abstract

The application of laser diagnostics to high pressure combustion phenomena is particularly challenging, especially in practical combustors such as rocket motors. In this study, temperature measurements using Laser Induced Thermal Grating Spectroscopy (LITGS) are demonstrated in oxygen enriched CH 4 /O 2 /N 2 premixed laminar flames at pressures up to 1.0?MPa. We use a previously developed OH absorption LITGS technique to determine product gas temperatures from 0.3 to 1.0?MPa, for both high temperature oxygen-enriched and pure-oxygen flames, for measurements up to 3000?K. Further, we demonstrate how it is necessary to correct the measurements for the local absorption of laser light to obtain accurate temperatures, and offer a technique for producing the correction by using different laser energies. Once the correction is applied, we demonstrate that the measurements at 0.5?MPa are within 1.6% of the adiabatic non-strained flame temperatures, with a standard deviation of about 160?K, thus offering a competitive method for the challenging conditions at high pressures and temperatures. The values obtained at derived temperatures at 1.0?MPa were lower than the adiabatic unstrained flame temperatures, which could possibly be attributed to loss mechanisms.

Original languageEnglish
Pages (from-to)1427-1434
Number of pages8
JournalProceedings of the Combustion Institute
Volume37
Issue number2
DOIs
Publication statusPublished - 2019

Keywords

  • High pressure
  • High temperature
  • LITGS
  • Oxygen enriched flames
  • Quantitative temperature measurement

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

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