Establishment of regularities of isothermal flow and mixture formation in microjet burners with three-row jet fuel supply

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.267891

Keywords:

microjet burners, flow structure, mixture formation of fuel and oxidizer, jet fuel supply

Abstract

The object of this research is the aerodynamics and mixture formation of fuel and oxidizer in stabilizer-type burners with a three-row system of fuel jets, focused on operation at coefficients of excess air 1.1...1.5. The study was conducted on the basis of CFD modeling using the RANS (Reynolds Averaged Navier-Stokes) approach.

The analysis of the basic regularities of the course of these processes in the proposed microjet burners was carried out. In this case, special attention was paid to the consideration of the characteristics of flow and mixture formation in the aft region of the flame stabilizer, where vortex structures are formed that are responsible for stabilizing the torch.

The regularities of influence on the flow and mixture formation in the proposed burner devices of such factors as the row number NR of the jet fuel supply, the relative pitch, S/d, of the location of gas supply holes and the coefficient of excess air, α, have been investigated. The presence of noticeable differences in the structure of flow and mixture formation in burners during fuel supply to different rows of gas supply holes has been established. It is shown that aerodynamics and the pattern of mixing fuel and oxidizer undergo significant changes when varying the value of S/d.

For the considered burner devices, rational design parameters of the fuel supply system have been determined, at which favorable conditions for mixture formation in the field of flame stabilization are ensured. In particular, it is shown that the rational S/d values are 5.4; 5.6; and 5.8, respectively, for the first, second, and third sections of the fuel supply.

The results can be widely used in energy practice for objects operated under conditions of variable values of the coefficient of excess air

Author Biographies

Nataliia Fialko, Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine

Corresponding Member of the National Academy of Sciences of Ukraine, Doctor of Technical Sciences, Professor

Department of Thermophysics of Energy Efficient Heat Technologies

Nataliia Meranova, Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine

PhD, Senior Researcher, Leading Researcher

Department of Thermophysics of Energy Efficient Heat Technologies

Julii Sherenkovskii, Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine

PhD, Senior Researcher, Leading Researcher

Department of Thermophysics of Energy Efficient Heat Technologies

Sergey Aleshko, Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine

PhD, Leading Researcher

Department of Thermophysics of Energy Efficient Heat Technologies

Michael Abdulin, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

Doctor of Technical Sciences, Professor

Department of Thermal and Alternative Energy

Vitalii Babak, Institute of General Energy of the National Academy of Sciences of Ukraine

Corresponding Member of the National Academy of Sciences of Ukraine, Doctor of Technical Sciences, Professor, Head of Department

Department of Monitoring and Diagnostics of Energy Facilities

Volodymyr Korzhyk, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Corresponding Member of the National Academy of Sciences of Ukraine, Doctor of Technical Sciences, Professor, Head of Department

Department of Electrothermal Processing Material

Vasyl Zhelykh, Lviv Polytechnic National University

Doctor of Technical Sciences, Professor, Head of Department

Department of Heat and Gas Supply and Ventilation

Institute of Civil Engineering and Building Systems

Roman Dinzhos, V. О. Sukhomlynskyi National University of Mykolaiv

Doctor of Technical Sciences, Professor

Department of Physics and Mathematics

Vladyslav Khaskin, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Doctor of Technical Sciences, Leading Researcher

Department of Electrothermal Processing Material

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Establishment of regularities of isothermal flow and mixture formation in microjet burners with three-row jet fuel supply

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Published

2022-12-30

How to Cite

Fialko, N., Meranova, N., Sherenkovskii, J., Aleshko, S., Abdulin, M., Babak, V., Korzhyk, V., Zhelykh, V., Dinzhos, R., & Khaskin, V. (2022). Establishment of regularities of isothermal flow and mixture formation in microjet burners with three-row jet fuel supply . Eastern-European Journal of Enterprise Technologies, 6(8 (120), 65–72. https://doi.org/10.15587/1729-4061.2022.267891

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Section

Energy-saving technologies and equipment