Polytechnic University of Valencia Congress, ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems

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Evaluation of the combustion characteristics of isolated droplets of Jet A blended with ethanol and butanol
Álvaro Muelas, Pilar Remacha, Javier Ballester

Last modified: 18-07-2017

Abstract


In light of the potential of ethanol and butanol as alternative fuels for blending with conventional kerosene in gasturbine engines, experimental data regarding the burning characteristics of these blends are required in order tobetter understand their combustion process. In this study, free-falling droplets of Jet A, ethanol, butanol and theirmixtures (20% alcohol in Jet A by volume) were examined in a combustion chamber which providesrepresentative conditions of real flames, both in terms of temperature and oxygen availability. Results show thatthe evolution of droplet diameter for Jet A and its blends with both alcohols are very similar, regardless of theobvious compositional differences. On the other hand, sooting behaviors are found to be quite different, with aclear reduction in the sooting propensity of the Jet A/alcohol mixtures when compared to neat kerosene. Theseresults are consistent with previous studies in gas turbines, suggesting that such blends are viable alternativefuels with similar combustion characteristics to Jet A, but with much less propensity to produce soot. Moreover,this study provides new results on the combustion properties of Jet A/ethanol and Jet A/butanol mixtures, forwhich very scarce data exist in the open literature.

DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4990


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