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Combustion of a high-velocity hydrogen microjet effluxing in air

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Abstract

This study is devoted to experimental investigation of hydrogen-combustion modes and the structure of a diffusion flame formed at a high-velocity efflux of hydrogen in air through round apertures of various diameters. The efflux-velocity range of the hydrogen jet and the diameters of nozzle apertures at which the flame is divided in two zones with laminar and turbulent flow are found. The zone with the laminar flow is a stabilizer of combustion of the flame as a whole, and in the zone with the turbulent flow the intense mixing of fuel with an oxidizer takes place. Combustion in these two zones can occur independently from each other, but the steadiest mode is observed only at the existence of the flame in the laminar-flow zone. The knowledge obtained makes it possible to understand more deeply the features of modes of microjet combustion of hydrogen promising for various combustion devices.

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Authors and Affiliations

  1. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630128, Russia

    V. V. Kozlov, G. R. Grek & Yu. A. Litvinenko

  2. Voevodskii Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    O. P. Korobeinichev & A. G. Shmakov

Authors
  1. V. V. Kozlov
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  2. G. R. Grek
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  3. O. P. Korobeinichev
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  4. Yu. A. Litvinenko
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  5. A. G. Shmakov
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Corresponding author

Correspondence to V. V. Kozlov.

Additional information

Original Russian Text © V.V. Kozlov, G.R. Grek, O.P. Korobeinichev, Yu.A. Litvinenko, A.G. Shmakov, 2016, published in Doklady Akademii Nauk, 2016, Vol. 470, No. 2, pp. 166–171

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Kozlov, V.V., Grek, G.R., Korobeinichev, O.P. et al. Combustion of a high-velocity hydrogen microjet effluxing in air. Dokl. Phys. 61, 457–462 (2016). https://doi.org/10.1134/S1028335816090068

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  • DOI: https://doi.org/10.1134/S1028335816090068

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