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

Gaetano Magnotti; Andrew D. Cutler; Paul Danehy

doi:10.2514/6.2012-1193

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 conference › Paper › peer-review

12 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, O₂ and H₂ 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 N₂, O₂ and H₂, 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 O₂, and between 1.5 and 3.4% for N₂. The standard deviation of H₂ 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 language	English (US)
DOIs	https://doi.org/10.2514/6.2012-1193
State	Published - 2012
Externally published	Yes
Event	50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States Duration: Jan 9 2012 → Jan 12 2012

Other

Other	50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Country/Territory	United States
City	Nashville, TN
Period	01/9/12 → 01/12/12

ASJC Scopus subject areas

Aerospace Engineering

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@conference{bd716036b06e40be87d943da54df1201,

title = "Development of a dual-pump CARS system for measurements in a supersonic combusting free jet",

abstract = "This work describes the development of a dual-pump CARS system for simultaneous measurements of temperature and absolute mole fraction of N 2, O2 and H2 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 N2, O2 and H2, 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 O2, and between 1.5 and 3.4% for N2. The standard deviation of H2 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.",

author = "Gaetano Magnotti and Cutler, {Andrew D.} and Paul Danehy",

year = "2012",

doi = "10.2514/6.2012-1193",

language = "English (US)",

note = "50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition ; Conference date: 09-01-2012 Through 12-01-2012",

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TY - CONF

T1 - Development of a dual-pump CARS system for measurements in a supersonic combusting free jet

AU - Magnotti, Gaetano

AU - Cutler, Andrew D.

AU - Danehy, Paul

PY - 2012

Y1 - 2012

N2 - This work describes the development of a dual-pump CARS system for simultaneous measurements of temperature and absolute mole fraction of N 2, O2 and H2 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 N2, O2 and H2, 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 O2, and between 1.5 and 3.4% for N2. The standard deviation of H2 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.

AB - This work describes the development of a dual-pump CARS system for simultaneous measurements of temperature and absolute mole fraction of N 2, O2 and H2 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 N2, O2 and H2, 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 O2, and between 1.5 and 3.4% for N2. The standard deviation of H2 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.

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U2 - 10.2514/6.2012-1193

DO - 10.2514/6.2012-1193

M3 - Paper

AN - SCOPUS:84862301144

T2 - 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Y2 - 9 January 2012 through 12 January 2012

ER -

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

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