Development of a dual-pump CARS system for measurements in a supersonic combusting free jet

Gaetano Magnotti*, Andrew D. Cutler, Paul Danehy

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

11 Scopus citations

Abstract

This work describes the development of a dual-pump CARS system for simultaneous measurements of temperature and absolute mole fraction of N 2, O 2 and H 2 in a laboratory scale supersonic combusting free jet. Changes to the experimental set-up 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 temperature above 800 K, errors in absolute mole fraction are within 1.5, 0.5, and 1% of the total composition for N 2, O 2 and H 2, respectively. Estimated 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 O 2, and between 1.5 and 3.4% for N 2. The standard deviation of H 2 is ∼10% of the average measured mole fraction. Results obtained in the jet with and without combustion are illustrated, and the capabilities and limitations of the dual-pump CARS instrument discussed.

Original languageEnglish (US)
StatePublished - Jun 20 2012
Event50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States
Duration: Jan 9 2012Jan 12 2012

Other

Other50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityNashville, TN
Period01/9/1201/12/12

ASJC Scopus subject areas

  • Aerospace Engineering

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