The experimental evaluation of a methodology for surrogate fuel formulation to emulate gas phase combustion kinetic phenomena

Stephen Dooley, Sang Hee Won, Joshua Heyne, Tanvir I. Farouk, Yiguang Ju, Frederick L. Dryer, Kamal Kumar, Xin Hui, Chih Jen Sung, Haowei Wang, Matthew A. Oehlschlaeger, Venkatesh Iyer, Suresh Iyer, Thomas A. Litzinger, Robert J. Santoro, Tomasz Malewicki, Kenneth Brezinsky

Research output: Contribution to journalArticle

300 Scopus citations

Abstract

A methodology for the formulation of surrogate fuels for the emulation of real fuel gas phase combustion kinetic phenomena pertinent to gas turbine combustion is described and tested. A mixture of n-dodecane/. iso-octane/1,3,5-trimethylbenzene/. n-propylbenzene is formulated in a predictive manner to exhibit the same gas phase combustion phenomena of a target Jet-A fuel by the sharing of fundamentally significant combustion property targets in addition to a prescribed commonality of chemical kinetically controlling intermediate species. The appropriateness of the surrogate formulation technique is demonstrated by the experimental measurement of various gas phase combustion kinetic phenomena of the proposed surrogate mixture and of the target Jet-A fuel:. (1)A variable pressure flow reactor is used to chart the chemical reactivity of a stoichiometric mixture of surrogate fuel/O 2/N 2 at 12.5atm and 500-1000K, for a residence time of 1.8s at a fixed carbon content of 0.3%.(2)The autoignition behavior of stoichiometric mixtures of surrogate fuel in air is measured with a shock tube at 667-1223K at ∼20atm and also with a rapid compression machine at 645-714K at compressed pressures of 21.7atm.(3)Detailed measurements of the intermediate species formed in the high temperature oxidation of the target fuel and in the oxidation of the surrogate fuel are performed with a shock tube for reaction times of 1.23-3.53ms at 18-35atm and 901-1760K for 0.0808/0.158/0.1187mole% mixtures of C/H/O 2.(4)The laminar burning velocity and strain extinction limits of premixed mixtures of surrogate fuel in O 2/N 2 are determined by the counter flow twin flame technique. These phenomena are also determined for premixed mixtures of the target fuel and for a previously proposed surrogate fuel composed of n-decane/iso-octane/toluene in O 2/N 2.(5)The high temperature chemical reactivity and chemical kinetic-molecular diffusion coupling of the surrogate fuel is evaluated by measurement of the strained extinction limits of diffusion flames.(6)The propensity of surrogate and real fuel to form soot is tested by laser extinction measurements of the soot volume fractions formed by each fuel in a wick-fed laminar flame diffusion burner as a function of the radial distance of each flame.These experimental data are compared to those previously reported at identical conditions for the target Jet-A fuel and for a similar n-decane/. iso-octane/toluene surrogate fuel. A conceptual theory of real fuel oxidation is proposed and the similarity of the exhibited combustion phenomena of all three fuels is analyzed and interpreted in this context in order to (a) further evaluate the proposed strategy to surrogate fuel formulation and the appropriateness of the proposed theory to real fuel oxidation, (b) evaluate the appropriateness of the proposed n-dodecane/. iso-octane/1,3,5-trimethylbenzene/. n-propylbenzene mixture as a surrogate fuel for the target Jet-A fuel, and (c) to provide direction for the development of a tractable numerical modeling framework to compute real fuel multiphase combustion phenomena.

Original languageEnglish (US)
Pages (from-to)1444-1466
Number of pages23
JournalCombustion and Flame
Volume159
Issue number4
DOIs
StatePublished - Apr 1 2012

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Keywords

  • Jet aviation fuel
  • Jet-A
  • Kinetic model
  • Surrogate fuel formulation

Fingerprint Dive into the research topics of 'The experimental evaluation of a methodology for surrogate fuel formulation to emulate gas phase combustion kinetic phenomena'. Together they form a unique fingerprint.

  • Cite this

    Dooley, S., Won, S. H., Heyne, J., Farouk, T. I., Ju, Y., Dryer, F. L., Kumar, K., Hui, X., Sung, C. J., Wang, H., Oehlschlaeger, M. A., Iyer, V., Iyer, S., Litzinger, T. A., Santoro, R. J., Malewicki, T., & Brezinsky, K. (2012). The experimental evaluation of a methodology for surrogate fuel formulation to emulate gas phase combustion kinetic phenomena. Combustion and Flame, 159(4), 1444-1466. https://doi.org/10.1016/j.combustflame.2011.11.002