Improved aircraft friction charging current model

During high-speed flight, the friction between the aircraft surface and space particles can accumulate static charges, resulting in electrostatic discharge, which poses a great threat to the safe flight of the aircraft. In this paper, the friction between the aircraft surface and the ice crystal particles is equivalent to the friction between the metal and the medium, and the charge distribution on the aircraft surface is regarded as the exponential distribution. Based on the solid-state electrification theory, this paper creates an advanced friction charging current model and infers the charging current on the aircraft surface during electrostatic balance. The frictional electrification current between ice crystals and aircraft surface metals is related to factors such as aircraft speed, altitude, and ice crystal concentration. This paper mainly studies the characteristics of aircraft friction charging current under the condition that the flight height of the aircraft is located in the range of 15 km ~ 30 km in the near space and the flight speed range is 1 Mach ~ 7 Mach.