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Numerical simulation of biogas combustion in a chamber with central air injection
| Title | Numerical simulation of biogas combustion in a chamber with central air injection |
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| Authors | U. J. Mizher1, M. J. Mezher2, P. M. Abrashkin3, P. A. Velmisov3 1Southern Technical University (Iraq) 2Al–Shatrah University (Iraq) 3Ul'yanovsk State Technical University |
| Annotation | The paper presents a numerical study of the reacting turbulent flow. The results of the study are intended to increase the stability and environmental friendliness of low-calorie biogas combustion. Based on the solution of the system of Navier-Stokes equations (RANS), supplemented by the two-parameter model of turbulence Realizable k- and the concept of vortex scattering (EDC), the influence of the central jet of secondary air on the macrostructure and thermal properties of the flare is analyzed. It is shown that injection initiates the formation of a stable central toroidal recirculation zone (CTRZ), which returns the combustion products and reliably stabilizes the flame root. It has been established that the supply of 20% of the central air is the optimal integrated mode, ensuring effective micro-mixing, minimizing emissions of unburned carbon monoxide (CO) and the retention of thermal nitrogen oxides within acceptable safe limits. The data obtained form the theoretical basis for the design and modernization of industrial eco-burners. |
| Keywords | computational fluid dynamics (CFD), biogas burning, central air injection, vortex scattering concept (EDC), emission reduction. |
| Citation | Mizher U. J., Mezher M. J., Abrashkin P. M., Velmisov P. A. ''Numerical simulation of biogas combustion in a chamber with central air injection'' [Electronic resource]. Mathematical modeling, numerical methods, and software systems: Collection of materials from the 12th All‑Russian Scientific Youth School‑Seminar named after E. V. Voskresensky (Saransk, July 21–24, 2026). - pp. 146-150. Available at: https://conf.svmo.ru/files/2026/papers/paper92.pdf. - Date of access: 25.09.2026. |
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