Numerical Modeling of Experimentally Obtained Lightning Arc Root Damage in Metal Sheets

摘要: This work investigates the evolution of simulated lightning-induced damage in aluminum cathode sheets based on experimental evidence and numerical modelling. Quasi-equilibrium thermal plasma discharges characterized by 50-950 A arc currents transferring up to 770 C charge were utilized experimentally investigate development at atmospheric pressure air. Heat-conduction model was developed computationally study resulting from lightning root attachment metal surface. It demonstrated that melting contrast evaporation dominant formation. The effective voltage drop range 10.5-13 V for sheet cathodes identified proposed predicts formation arcs with 200 transfer. inferred lies close proximity true falls reported literature. Both experiment modelling indicate volume a thin induced is proportional ratio, material-dependent constant which higher metals lower point, computed various metals, including alloy value good agreement data.