Effects of vitiation and pressure on laminar flame speeds of n-decane

C. C. Fuller, P. Gokulakrishnan, M. S. Klassen, S. Adusumilli, Y. Kochar, D. Bloomer, J. Seitzman, H. H. Kim, S. H. Won, F. L. Dryer, Yiguang Ju, B. V. Kiel

Research output: Contribution to conferencePaper

7 Scopus citations

Abstract

Air Force Research Laboratory, Wright Patterson Air Force Base, Dayton, OH, 45433 There is currently a lack of experimental data required for kinetic model validation of the effect of oxidizer vitiation on laminar flame speeds of aviation fuels. This study examines the role of vitiation through the introduction of CO2 and H2O to the oxidizer stream at varying pressures (0.5-5.0 atm) at 450 K, conditions relevant to vitiated combustion devices, using n-decane as the model fuel. The experimental portion of this effort has acquired laminar flame speed data of n-decane in vitiated air using two separate techniques. A well-validated Bunsen Flame Technique was used to primarily examine the effect of total dilution and vitiation over a range of equivalence ratios and the Combustion Bomb Technique was used to investigate vitiation effects at various pressures and equivalence ratios. Overlap between measurement techniques has been performed as well as comparison to an analytical model to better understand the thermodynamic and chemical kinetic effects that vitiation has on hydrocarbon fuel combustion and flame structure. Experimental data shows that CO2 has the largest effect in reducing the flame speed over the range of equivalence ratios and pressures studied. Based on a kinetic analysis, chemical kinetic effects play a major role in reducing the flame speed when CO2 is present. The impact of chemical kinetic effects due to the diluent species on flame speed was found to have the following trend: CO2 > H2O > N2.

Original languageEnglish (US)
DOIs
StatePublished - 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

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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    Fuller, C. C., Gokulakrishnan, P., Klassen, M. S., Adusumilli, S., Kochar, Y., Bloomer, D., Seitzman, J., Kim, H. H., Won, S. H., Dryer, F. L., Ju, Y., & Kiel, B. V. (2012). Effects of vitiation and pressure on laminar flame speeds of n-decane. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States. https://doi.org/10.2514/6.2012-167