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

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.

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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

Hottel H.C., Hawthorne W.R. Diffusion in laminar flame jets. Third Symposium on Com-bustion and Flame and Explosion Phenomena. 1949. Vol. 3. pp. 254–266.

Abramovich G.N. Theory of Turbulent Jets. Moscow : Fizmatgiz, 1960. 715 p. (Rus.)

Spalding D.B. Some Fundamentals of Combustion. London : Butterworths, 1955. 250 p.

Ivanov Yu.V. [Fundamentals of calculation and design of gas burners]. Moscow : Gostoptekhizdat, 1963. 360 p. (Rus.)

Ivanov Yu.V. [Gas burner devices]. Mos-cow : Nedra, 1972. 276 p. (Rus.)

Warnatz J., Maas U., Dibble R.W. Com-bustion: physical and chemical fundamentals, mod-eling and simulation, experiments, pollutant for-mation. Berlin : Springer Science & Business Me-dia, 2006. 378 p.

Sigal I.Ya., Lavrentsov E.M., Kosinov O.I., Dombrovskaya E.P. [Gas-fired heat-water supply industrial boilers]. Kyiv : Tekhnika, 1967. 145 p. (Rus.)

Lavrentsov E.M., Sigal I.Ya., Smikhula A.V., Dombrowska E.P., Kernazhytska E.S., Mara-sin O.V. [Experience of development, implementa-tion and modernization of hot water supply boilers with dual-screens and the slot bottom burners]. Energotecnologii i resursosberezheniye. [Energy Technologies and Resource Saving]. 2019. No. 3. pp. 17–26. (Ukr.)

Mikheev V.P., Fedorov V.P. [Bottom slot burners for natural gas]. Leningrad : Nedra, 1965. 74 p. (Rus.)

Directive (EU) 2015/2193 (2015) Of the European parliament and of the council of 25 No-vember 2015 on the limitation of emissions of certain pollutants into the air from medium com-bustion plants, Official Journal of the European Union, 2015, 28 November, 19 p.

Smikhula A.V. [Development and research of power bottom slot burners for tower hot water boilers : Abstract of the dissertation]. Kyiv : The Gas Institute, 2007. 20 p. (Ukr.)

Sigal I.Ya., Smikhula A.V., Marasin O.V., Kouts V.P., Dombrowska E.P., Kolchev V.O., Kernazhytska E.S. [Experimental research of a biogas as a fuel for boilers]. Energotecnologii i resursosberezheniye. [Energy Technologies and Resource Saving]. 2013. No. 5. pp. 26–32. (Rus.)

Shchelkin K.I. [The theory of combustion and detonation. In: Mechanics in the USSR for 50 years]. Moscow, 1970. Vol. 2. pp. 344–422. (Rus.)

Ricou F.P., Spalding D.B. Measurements of entrainment by asymmetrical turbulent jets. Journal of Fluid Mechanics. 1961. 11 (1). pp. 21–32.

Abramovich G.N., Krasheninnikov S.Yu., Sekundov A.N., Smirnova I.P. [Turbulent Mixing of Gas Jets]. Moskow : Nauka, 1974. 272 p. (Rus.)

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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