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Experimental study of the influence of the swirl number on lean premixed combustion regimes

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Abstract

Lean premixed turbulent swirling combustion is known for significantly reducing pollutants emissions, when compared to non-premixed turbulent flames. Characterizing the swirl number influence is therefore essential to comparing different combustion chamber operational regimes. The present study is devoted to the experimental characterization of a new family of swirlers currently being developed. The associated combustion process is found to exhibit different flame topologies, or combustion regimes, which are functions of the mixture equivalence ratio and flow rate. The flame topologies and the boundaries between the observed combustion regimes are evidenced by means of OH\(^*\) chemiluminescence and overall flame chemiluminescence.

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Acknowledgements

This work was supported by PUC-Rio and Laboratoire EM2C CNRS, CentraleSupelec (France). L.F. Figueira da Silva was on leave from the Institut Prime (CNRS, France), L.C. Piton and G.S. Nobrega had scholarships from CNPq (Brazil), processes 103200/2018-5 and 372367/2017-8, respectively. The authors also gratefully acknowledge the support for the present research provided by Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, under the Research Grants No. 306069/2015-6 and 403904/2016-1.

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Author notes

  1. Letícia Carneiro Piton

    Present address: Laboratoire ICARE, CNRS, Orléans, France

Authors and Affiliations

  1. Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brazil

    Letícia Carneiro Piton, Gabriela Senra Pessanha Rios Nobrega & Luís Fernando Figueira da Silva

  2. Laboratoire EM2C, CNRS, CentraleSupélec, Université Paris-Saclay, Gif-sur-Yvette, France

    Philippe Scouflaire & Nasser Darabiha

Authors
  1. Letícia Carneiro Piton
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  2. Gabriela Senra Pessanha Rios Nobrega
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  3. Luís Fernando Figueira da Silva
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  4. Philippe Scouflaire
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  5. Nasser Darabiha
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Correspondence to Letícia Carneiro Piton.

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Technical Editor: Cristiano Bigonha Tibiriçá.

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This article was selected from a collection of top papers presented at the 17th Brazilian Congress of Thermal Sciences and Engineering, held at Águas de Lindóia, SP, 25–28 November 2018.

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Carneiro Piton, L., Senra Pessanha Rios Nobrega, G., Figueira da Silva, L.F. et al. Experimental study of the influence of the swirl number on lean premixed combustion regimes. J Braz. Soc. Mech. Sci. Eng. 42, 210 (2020). https://doi.org/10.1007/s40430-020-02274-w

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  • DOI: https://doi.org/10.1007/s40430-020-02274-w

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