Development of a dual-pump coherent anti-Stokes Raman spectroscopy system for measurements in supersonic combustion

Gaetano Magnotti*, Andrew D. Cutler, Paul M. Danehy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

This work describes the development of a dual-pump coherent anti-Stokes Raman spectroscopy system for simultaneous measurements of the temperature and the absolute mole fraction of N2, O2, and H2 in supersonic combusting flows. Changes to the experimental setup and the data analysis to improve the quality of the measurements in this turbulent, high-temperature reacting flow are described. The accuracy and precision of the instrument have been determined using data collected in a Hencken burner flame. For temperatures above 800 K, errors in the absolute mole fraction are within 1.5%, 0.5%, and 1% of the total composition for N2, O2, and H2, respectively. Standard deviations based on 500 single shots are between 10 and 65 K for the temperature, between 0.5% and 1.7% of the total composition for O2, and between 1.5% and 3.4% for N2. The standard deviation of H2 is ∼10% of the average measured mole fraction.

Original languageEnglish (US)
Pages (from-to)4779-4791
Number of pages13
JournalApplied Optics
Volume52
Issue number20
DOIs
StatePublished - Jul 10 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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