嵌入式机场助航灯具污染胶层去除机理

通常称助航灯光是飞机的眼睛,清晰明亮的灯光标志既有利于飞行安全,又能为机场安全运营提供保障。本文利用刚性压头作用于弹性半空间上引起的压痕理论(Boussinesq模型)与Southern和Thomas处理疲劳裂纹扩展的理论相结合,研究碳酸氢钠颗粒每次冲击去除助航灯具污染胶层质量的数学模型,然后将其转换成冲蚀率,最后并进行实验分析。从该模型中可以看出污染胶层冲蚀率与胶层性能,碳酸氢钠粒子的尺寸、冲击速度、冲击角度等参数的关系,通过已有实验结果分析,并得出当喷射压力为0.62MP,喷射角度为73°时,除胶效果最佳。

Study on Mechanism of Rubber Mud Removal in Airport Navigation Lights

It is generally said that the navigation aid light is the eye of the aircraft. The clear and bright light sign not only benefits flight safety, but also guarantees the safe operation of the airport. In this paper, the theory of indentation caused by rigid indenter on elastic half space (Boussinesq model) is combined with the theory of fatigue crack propagation by Southern and Thomas. The mathematical model of the quality of the contaminated rubber layer of the navigation aids was studied by impacting the sodium bicarbonate particles each time, and then converted into an erosion rate, and finally an experimental analysis was carried out. From this model, we can see the relationship between the erosion rate of the rubber layer and the performance of the rubber layer, the size of the sodium bicarbonate particles, the impact velocity, and the impact angle. According to the analysis of the existing experimental results, the best degreasing effect is obtained when the injection pressure is 0.62 MP and the spray angle is 73°.