飞行器表面沉积静电分布仿真

研究飞行器表面沉积静电分布规律对于评估其在飞行过程中的静电安全性具有重要意义.结合某型实体飞机开展1:1仿真建模与计算.通过仿真计算,得到了飞机在飞行状态下的电容,对比分析了模型结构、沉积电荷量对飞机表面电荷密度和电场分布的影响规律.结果表明:在飞行状态下飞机的电容约为460.5 pF;模型结构对飞机机头处的静电场有影响,驾驶舱、机舱舷窗等结构使得机头处的静电场变化约20％,而对其他位置处的静电场影响较小;不同沉积电荷量下飞机各放电刷处的静电场强度呈线性变化规律,飞机各放电刷处静电场强度不同,其中放电刷静电场强度最高处比最低处高约97％.

Simulation on Electrostatic Distribution of Precipitation Static on Air-craft

The study of the electrostatic distribution of precipitation static on the surface of aircraft is of great significance to evaluate its electrostatic safety during flight. In this paper, the 1:1 simulation model of a certain type of aircraft is modelled. A series of simulations are conducted base on the 1:1 aircraft model, including the capacitance of the aircraft in flight, the aircraft model structure and the precipitation charge. The effect of the aircraft model structure and the precipitation charge on the surface charge density and electric field distribution of the aircraft are studied. The simulation results indicate that the capacitance of the aircraft in flight is approximate 460.5pF. The aircraft model structure has an impact on the electrostatic field at the nose of the aircraft. Adding the cockpit and the cabin porthole to the simplified aircraft model, increases the electrostatic field approximate 20% at the nose. However, the cockpit and the cabin porthole have little effect on the electrostatic field at other locations. The electrostatic field intensity at each discharge brush varies linearly under different precipitation charge. It is diverse from each other, with the highest electrostatic field strength is approximate 97% higher than that of the lowest.