Influence of the aerodynamic flow on the dynamic characteristics of a lightning sweeping arc

Lightning arc attachments during swept strokes are key information in the lightning protection design of fast-moving aircraft, wind turbines, rockets, etc. However, numerical modeling has not achieved success to predict movement sweeping arcs due limited understanding complex multi-physics convolution fluid at present. This work builds a dynamic magneto-hydrodynamic (MHD) model based on setup laboratory simulation continuing current and couples electric–magnetic–thermal–force processes get insights into dynamics. The MHD theory Newton’s second law motion also incorporated describe segments conditions aerodynamic flows with different intensities. Results show that, center region arc, electromagnetic force, thermal buoyancy, force competitive, all determiners predicting displacement. In contrast, root dominates flow speed under 10 m/s, while takes dominant role when exceeds 50 m/s. distance expands from 0.02 1.01 m as increases 5 200 Meanwhile, increasing pitch angle arc-connected surface, becomes more attached surface is predicted reduced. conclusions offer references construct strokes.