DIFFUSION COMBUSTION OF A HYDROGEN MICROJET, OUTFLOWING FROM A CURVLINEAR CHANNEL

V. V. Kozlov; Козлов В. В.; A. V. Dovgal; Довгаль А. В.; M. V. Litvinenko; Литвиненко М. В.; Yu. A. Litvinenko; Литвиненко Ю. А.; A. G. Shmakov; Шмаков А. Г.

doi:10.31857/S2686740023060123

DIFFUSION COMBUSTION OF A HYDROGEN MICROJET, OUTFLOWING FROM A CURVLINEAR CHANNEL

Authors: Kozlov V.V.¹, Dovgal A.V.¹, Litvinenko M.V.¹, Litvinenko Y.A.¹, Shmakov A.G.¹
Affiliations:
1. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences,
Issue: Vol 513, No 1 (2023)
Pages: 72-75
Section: МЕХАНИКА
URL: https://journals.rcsi.science/2686-7400/article/view/247147
DOI: https://doi.org/10.31857/S2686740023060123
EDN: https://elibrary.ru/HTFPRO
ID: 247147

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Abstract
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Abstract

The presented work examines the combustion of a hydrogen microjet flowing from a curved channel with a round micronozzle. Jet flows that are generated using rectilinear and curved channels differ in that in the second case, Dean vortices make a noticeable contribution to the formation of the jet and its combustion. The interaction of the latter with Kelvin–Helmholtz vortices, the formation of which is typical for flows with a velocity shift, causes changes in combustion characteristics. They include spatial distortions of the laminar flame zone near the nozzle exit, the area of turbulent combustion downstream, as well as the turbulent flame in the conditions of its separation from the nozzle exit and the cessation of laminar combustion in the initial section of the flow. The results of these studies provide an opportunity to better understand the combustion features of hydrogen microjets under conditions of their hydrodynamic instability.

Keywords

curvilinear channel, Dean vortices, hydrogen microjet, diffusion combustion

References

Dean W.R. Note on the Motion of Fluid in a Curved Pipe // Phil. Mag. 1927. V. 4. P. 208–223.
Dean W.R. The Stream-Line Motion of Fluid in a Curved Pipe // Phil. Mag. 1928. V. 5. P. 671–695.
White C.M. Streamline Flow through Curved Pipes // Proc. Roy. Soc. 1929. V. 123. P. 645–663.
Шлихтинг Г. Теория пограничного слоя. М.: Наука, 1969. 742 с.
Kozlov V.V., Grek G.R., Korobeynichev O.P., Litvinenko Yu.A., and Shmakov A.G. Features of diffusion combustion of hydrogen in the round and plane high-speed microjets. Pt II // Int. J. Hydrogen Energy. 2016. V. 41. Iss. 44. P. 20240–20249.