COMBUSTION RESEARCH OF IMPINGING GAS JETS AT STABILIZATION OF THE FLAME FRONT ON A VERTICAL SURFACE

  • I.Ya. Sigal The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv https://orcid.org/0000-0002-2122-3823
  • A.V. Smikhula The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv https://orcid.org/0000-0002-9698-9225
  • O.I. Sigal Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine, Kyiv
  • O.V. Marasin The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv https://orcid.org/0000-0001-7575-6038
Keywords: flame stabilization, impinging jet, slot burner, combustion

Abstract

The conditions of stabilization of combustion of detached gas jets on the vertical surface of the range of nozzle diameters d0 = 1.6–3.0 mm are investigated. The mechanism of flame stabilization of a detached gas jet on a vertical surface is shown, which allows to increase the gas flow rate through one nozzle by 3 or more times with stable combustion, compared to diffusion combustion of a free gas jet, which is not stabilized. The optimal distance to the vertical refractory surface in the nozzle calibers for the creation of slot bottom burner devices has been established. The necessity of using the minimum angles of attack till failure of combustion, which were experimentally founded, for the construction of slot bottom burner devices, is substantiated. It is experimentally established that starting from the gas pressure in the collector-pipe near 500 mmwg and, accordingly, the speed of its flow through the nozzle is more than near 100 m/s at a distance to the vertical surface on which the flame is stabilized 15 < L/d0 <= 30, for the range of nozzle diameters d0 = 1.6–3.0 mm, dimensionless area base sg/s0 of the elliptical cylinder Eb, less than 2–2.5 times of the maximum observed at a distance L/d0 near 40. Bibl. 15, Fig. 6.

Author Biographies

I.Ya. Sigal, The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv

Doctor of Technical Sciences

A.V. Smikhula, The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv

Candidate of Technical Sciences

O.I. Sigal, Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine, Kyiv

Candidate of Technical Sciences

O.V. Marasin, The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv

Candidate of Technical Sciences

References

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Published
2020-12-20
How to Cite
Sigal, I., Smikhula, A., Sigal, O., & Marasin, O. (2020). COMBUSTION RESEARCH OF IMPINGING GAS JETS AT STABILIZATION OF THE FLAME FRONT ON A VERTICAL SURFACE. Energy Technologies & Resource Saving, (4), 29-38. https://doi.org/10.33070/etars.4.2020.03
Section
Thermophysical basics of energy processes

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