Faculty of Agricultural MechanisationBook 1.1 · Agricultural Engineering. Agricultural Science and Medicine. Repair and Reliability. Industrial Design. Thermotechnics, Hydro- and Pneumotechnics. Ecology and Environment Protection

FRI-9.2-1-THPE-07

INFLUENCE OF MODE AND DESIGN PARAMETERS ON THE COMBUSTION EFFICIENCY OF INJECTED ROTARY JET

Ivan Petrov, PhD Student

Department “Mechanics, Mechanical Engineering and Heat Engineering” Sliven Technical University of Sofia

E-mail: ivan.apetrov@tu-sofia.bg

Assoc. Prof. Neven Krystev, PhD

Department “Mechanics, Mechanical Engineering and Heat Engineering” Sliven Technical University of Sofia

E-mail: nkrystev@tu-sofia.bg

Abstract

The characteristic of flat flame burners is the creation of a radial jet that develops in a plane perpendicular to their axis on a refractory surface. By burning gas fuel in a flat torch, the treated surfaces are heated evenly, the quality of heat treatment is improved, local overheating of the product is avoided (compared to straight burners) and higher process temperatures are ensured. The positive qualities of the spinning jet are due to its aerodynamics. Studying its features and taking them into account when creating new and improving existing engineering design methods is the basis for creating efficient combustion devices. The requirements placed on the creation of new or optimization of existing combustion devices is the need to ensure a regulated level of emissions of harmful gaseous products, which is associated with an appropriate selection of the relevant mode and design parameters of combustion devices. Reducing emissions and increasing the efficiency of combustion devices continues to motivate the scientific and research community, and to stimulate the technological development of combustion systems and the possibility of influencing the combustion process, leading to its optimal management. In the present work, the influence of basic mode and design parameters on the combustion efficiency of an injected rotary jet is analyzed, which is a prerequisite for effectively influencing the combustion process in order to intensify it.

Keywords

burning, flat flame burner, combustion efficiency, injected rotating jet flat torch

REFERENCES

Akhmedov, R., Balagula, T., Rashidov, F., & Sakaev, A. (1977). Aerodynamics of swirling jet. Energia. Moscow. 1977(Оригинално заглавие: Ахмедов, Р., Балагула, Т., Рашидов, Ф., Сакаев, А. Аэродинамика закрученной струи. Энергия. Москва. 1977).
Atanasov, K., Krystev, N., & Ivanov, I. (2024). Possibilities of using composite flare obtained from gas injection burners. Mechanics of Machines, ISSN0861-9727, Bulctomm, Varna, 2024 (Оригинално заглавие: Атанасов, К., Кръстев, Н., Иванов, И. Възможности за използване на съставен факел получен от инжекционни газови горелки. Механика на машините, ISSN0861- 9727, Bulctomm, Варна, 2024).
Kostov, K., Denev, I., & Krystev, N. (2022). Research of the combustion process in the initial mixing section of the injection gas burner. Polityka Energetyczna - Energy Policy Journal 2022;25(3):21-34, ISSN 1429-6675, https://doi.org/10.33223/epj/152805.
Kostov, P., Krystev, N., & Dimitrov, I. (2011). Influence of the mode and design parameters of a vortex gas burner on the basic dimensions and shape of a flat injected flare, Heat Engineering, Volume 2, ISSN 1314-2550, 2011 (Оригинално заглавие: П. Костов, Н. Кръстев, И. Димитров, Влияние на режимните и конструктивни параметри на вихрова газова горелка върху основните размери и формата на плосък инжектиран факел, Топлотехника, том 2, ISSN 1314-2550, 2011).
Krystev, N. (2006). Influence of excess air coefficient of injection and flat flame burner on NO_X emissions, Journal of Mechanics of Machines, TU-Varna, vol. 62, ISSN 0861-9727, p. 59, 2006. (Оригинално заглавие: Кръстев Н., „Влияние на коефициента на излишък на въздуха на инжекционна и плоскопламъчна горелка върху емисиите 𝑁𝑂 “, сп.” Механика на машините”, 𝑋 Изд. на ТУ-Варна, кн. 62, ISSN 0861-9727, с. 59, 2006 г).
Krystev, N. (2006). Influence of the mode and design parameters of the combustion device on the formation of nitrogen oxides during combustion of gaseous fuel, Dissertation for the award of the educational and scientific degree Doctor, VAK, Sliven, No/Date: 16-14 / 20.12.2006 (Оригинално заглавие: Кръстев, Н., Влияние на режимните и конструктивни параметри на горивното устройство върху образуването на азотни оксиди при изгаряне на газово гориво, Дисертация за присъждане на образователната и научна степен Доктор, ВАК, Сливен, No/дата: 16-14 / 20.12.2006).
Lyakovsky, D. N. (1982). Turbulence in straight and twisted jets, Proc. Theory and Practice of Gas Combustion, L., Nedra, 1982. (Оригинално заглавие: Ляковский Д. Н., Турбулентност в правоточные и закрученой струи, сб. Теория и практика сжигания газа, Л., Недра, 1982).
Petrov, I. A. (2024). Regression analysis of experimental data in a study of the performance of a flat flame burner. Polityka Energetyczna - Energy Policy Journal, 27(2), pp.89-104. https://doi.org/10.33223/epj/185719.
Syred, N., & Beér, J. M. (1974). Combustion in swirling flows: A review, Combustion and Flame, Volume 23, Issue 2,1974, Pages 143-201, ISSN 0010-2180, https://doi.org/10.1016/0010-2180(74)90057-1.
Taimarov, M. A. (2016). Determination of boiler efficiency by inverse balance during combustion of liquid fuel: Methodical instructions for laboratory work on the discipline "Boiler units and their design" - Kazan: Kazan. state power University, 2016. (Оригинално заглавие: Таймаров М.А., Определение КПД котла по обратному балансу при сжигании жидкого топлива: Методические указания к лабораторной работе по дисциплине «Котлоагрегаты и их конструирование» - Казань: Казан. гос. энерг. ун-т, 2016).
Torbov, C., Popov, K., Yurukov, I., & Peev, D. (1980). Control of the combustion process. Technika Publishing House. Sofia. 1980 (Оригинално заглавие: Торбов Ц., Попов К, Юруков И., Пеев Д., Контрол на горивния процес, издателство Техника, София, 1980).