Flow reactor autoignition studies of Iso-octane at high pressures and low to intermediate temperatures

Michelle K. Christensen, Sibtosh Pal, Roger D. Woodward, Thomas Litzinger, Robert J. Santoro, Stephen Dooley, Frederick L. Dryer

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

A novel methodology for studying autoignition of pre-vaporized hydrocarbons at non-dilute conditions in a high-pressure flow reactor has been developed. In this methodology, the minimum equivalence ratio required for ignition at specific conditions of pressure, temperature and residence time was found. Iso-octane was vaporized with a hydrogen/oxygen/argon preburner and rapidly mixed in a high pressure flow reactor. Ignition was studied at pressures of 15, 17.5, 20, and 22.5 atm, for a temperature range of 650-850K. Residence times of approximately 70, 100, 125, 155, and 175 ms were investigated over equivalence ratios ranging from 0.25 to 0.8. The negative temperature coefficient (NTC) region for autoignition was observed over these conditions, where an inverse equivalence ratio dependence at varying pressures and residence times was shown. Results show qualitative agreement with a recent chemical kinetics model from Lawrence Livermore National Laboratory, for the conditions studied in this work.

Original languageEnglish (US)
DOIs
StatePublished - Dec 1 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
Period1/9/121/12/12

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Ignition
Temperature
Negative temperature coefficient
Reaction kinetics
Argon
Hydrocarbons
Hydrogen
Oxygen

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

Christensen, M. K., Pal, S., Woodward, R. D., Litzinger, T., Santoro, R. J., Dooley, S., & Dryer, F. L. (2012). Flow reactor autoignition studies of Iso-octane at high pressures and low to intermediate temperatures. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States. https://doi.org/10.2514/6.2012-500
Christensen, Michelle K. ; Pal, Sibtosh ; Woodward, Roger D. ; Litzinger, Thomas ; Santoro, Robert J. ; Dooley, Stephen ; Dryer, Frederick L. / Flow reactor autoignition studies of Iso-octane at high pressures and low to intermediate temperatures. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States.
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Christensen, MK, Pal, S, Woodward, RD, Litzinger, T, Santoro, RJ, Dooley, S & Dryer, FL 2012, 'Flow reactor autoignition studies of Iso-octane at high pressures and low to intermediate temperatures' Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States, 1/9/12 - 1/12/12, . https://doi.org/10.2514/6.2012-500

Flow reactor autoignition studies of Iso-octane at high pressures and low to intermediate temperatures. / Christensen, Michelle K.; Pal, Sibtosh; Woodward, Roger D.; Litzinger, Thomas; Santoro, Robert J.; Dooley, Stephen; Dryer, Frederick L.

2012. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States.

Research output: Contribution to conferencePaper

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AU - Christensen, Michelle K.

AU - Pal, Sibtosh

AU - Woodward, Roger D.

AU - Litzinger, Thomas

AU - Santoro, Robert J.

AU - Dooley, Stephen

AU - Dryer, Frederick L.

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AB - A novel methodology for studying autoignition of pre-vaporized hydrocarbons at non-dilute conditions in a high-pressure flow reactor has been developed. In this methodology, the minimum equivalence ratio required for ignition at specific conditions of pressure, temperature and residence time was found. Iso-octane was vaporized with a hydrogen/oxygen/argon preburner and rapidly mixed in a high pressure flow reactor. Ignition was studied at pressures of 15, 17.5, 20, and 22.5 atm, for a temperature range of 650-850K. Residence times of approximately 70, 100, 125, 155, and 175 ms were investigated over equivalence ratios ranging from 0.25 to 0.8. The negative temperature coefficient (NTC) region for autoignition was observed over these conditions, where an inverse equivalence ratio dependence at varying pressures and residence times was shown. Results show qualitative agreement with a recent chemical kinetics model from Lawrence Livermore National Laboratory, for the conditions studied in this work.

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Christensen MK, Pal S, Woodward RD, Litzinger T, Santoro RJ, Dooley S et al. Flow reactor autoignition studies of Iso-octane at high pressures and low to intermediate temperatures. 2012. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States. https://doi.org/10.2514/6.2012-500