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Turbulent non-premixed ethanol–air flame experimental study using laser diagnostics

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Abstract

A turbulent non-premixed ethanol spray flame is characterized through experiments using planar laser-induced fluorescence (PLIF) of the OH radical and Mie scattering of fuel droplets distribution. The spray burner generates a stable flame with the use of a bluff body. The OH fluorescence intensity demarcates the reaction zone. Initially, different water spray loadings are compared, allowing determining the spray characteristics. Then, two combustion situations are studied emphasizing the instantaneous distribution of the droplet cloud with respect to the reaction zone. The instantaneous and average OH images allow identifying local flame extinction. In the first situation, the spray is surrounded by flame, and complete droplet evaporation occurs before combustion, which represents a classical behaviour. In the second situation, droplets interact strongly with the combustion process leading to an unusually large extinction.

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Acknowledgments

This work was performed under the grant CAPES-PRÓ-ENGENHARIAS – PE00X/2012 while the second author was on leave from the Institut Pprime, CNRS, France. The support received from Petrobras during the development of this work is also acknowledged.

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Authors and Affiliations

  1. Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900, Rio de Janeiro, RJ, Brazil

    Julio César Egúsquiza Goñi & Luís Fernando Figueira da Silva

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  1. Julio César Egúsquiza Goñi
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  2. Luís Fernando Figueira da Silva
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Correspondence to Luís Fernando Figueira da Silva.

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Technical Editor: Fernando Alves Rochinha.

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Egúsquiza Goñi, J.C., Figueira da Silva, L.F. Turbulent non-premixed ethanol–air flame experimental study using laser diagnostics. J Braz. Soc. Mech. Sci. Eng. 35, 177–188 (2013). https://doi.org/10.1007/s40430-013-0017-y

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  • DOI: https://doi.org/10.1007/s40430-013-0017-y

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