Method for calculating spherical expanding flame radius considering the ignition electrode's influence

In this study, a method was developed to calculate the radius of a spherical expanding flame, with the goal of mitigating the effects of the ignition electrode. This approach allows for a swift determination of the ignition electrode's influence on the spherical expanding flame. It also facilitates accurate computation of the flame radius and offers a systematic means to validate the derived laminar burning velocity. Using this method as a foundation, an evaluation system was established to examine factors that could impact the method's results. Findings suggest that the laminar burning velocity determined by this method aligns more closely with numerical simulations and experimental data from referenced studies. For spherical expanding flames with convex and concave contours near the ignition electrode, the mean flame radius decreases by 0.57% to 1.22% and increases by 1.37% to 2.95%, respectively.