Combustion behavior of low swirl flames under the influence of a magnetic field

• Investigate the impact of magnetic fields on low-swirl flames. • The study focused on how magnetohydrodynamic (MHD) interactions influence flame stabilization, structure, and emissions. • Understanding magnetic field effects enables novel strategies to enhance combustion and result in low-emission burners. • To assess magnetic field effects on turbulent flames, focusing on the mechanisms behind magnetic field-flame interactions. This study investigates the influence of magnetic fields on the swirl flame structure, flame temperature, and emissions of premixed LPG low-swirl flames under varying magnetic field strengths and equivalence ratios (φ = 0.483 and 0.986). Both experimental and numerical observations for low-swirl flames under various conditions, including the effect of magnetic force, were discussed. Experiments were performed using a swirl burner, swirl flame photography, temperature, and emissions measurements to evaluate the dynamic swirl flame, stability, flame temperature distribution, and (NOx, CO, and CO 2 ) emissions. CFD software ANSYS 17.0 FLUENT is used to model and simulate the dynamics of a premixed swirl flame through a vertical burner under the influence of a magnetic field. The results highlight the stabilizing influence of the magnetic field on swirl flames. By decreasing the growth factor, the magnetic field mitigates flame instabilities, thereby improving combustion stability, enhancing efficiency, and reducing the likelihood of incomplete combustion and pollutant formation. The results indicate that the NOx emission growth under magnetic fields is more pronounced at higher equivalence ratios (closer to stoichiometric). While it demonstrates that the magnetic field promotes more efficient oxidation, the effect is more pronounced at higher equivalence ratios, where combustion is closer to stoichiometric and mixing limitations are stronger. This trend confirms the complementary behavior of CO and CO 2 : as CO decreases under the magnetic field, CO 2 correspondingly increases, indicating more complete combustion.