Effects of high-speed airflow on discharge phenomena of aircraft Discharge brushes

Abstract To investigate high-speed airflow’s impact on discharge brushes’ corona discharge characteristics and charge dissipation efficiency, a COMSOL Multiphysics numerical model was built. It analyzed distributions and dynamics of electrons, positive/negative ions at the brush tip under quiescent air and 100 m/s airflow. Results show that no airflow causes ion accumulation (low mobility) and electric field shielding, suppressing discharge and reducing efficiency; high-speed airflow accelerates ion transport, weakens shielding, enhances discharge intensity/stability and positive ion migration, improving efficiency. This confirms airflow’s key role, with future designs needing aerodynamic considerations.