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Mixture Fraction Analysis of Combustion Products in Medium-Scale Pool Fires



Ryan Falkenstein-Smith, Kunhyuk Sung, Jian Chen, Anthony Hamins


A mixture fraction analysis is performed to investigate the characteristics of time-averaged gaseous species measurements made along the centerline of medium-scale pool fires steadily burning in a quiescent environment. A series of fire experiments are conducted using 30 cm diameter liquid and 37 cm diameter gas pool burners. All gaseous species measurements are extracted at various heights within the firer and analyzed using a Gas Chromatograph with mass selectivity and thermal conductivity detectors. Soot mass fractions are simultaneously measured during gas sampling. For all fuels, the results show that the local composition plotted as a function of mixture fraction collapses the experimental data into a few coherent lines that nearly match the idealized reactions. Differences between the theoretical and experimental data are attributed to the presence of carbon monoxide soot and other intermediate carbon-containing species.
Proceedings of the Combustion Institute


Mixture fraction, Pool fires, Carbon-to-Hydrogen ratio, Combustion products, Chemical composition


Falkenstein-Smith, R. , Sung, K. , Chen, J. and Hamins, A. (2020), Mixture Fraction Analysis of Combustion Products in Medium-Scale Pool Fires, Proceedings of the Combustion Institute, [online], (Accessed July 21, 2024)


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Created November 12, 2020, Updated March 1, 2021