Safety analysis of aircraft encountering wake vortex

The response mechanism of aircraft encountering wake vortex was analyzed, and the calculation model of induced moment was developed. The calculating model of aircraft's rolling parameters was constructed based on considering of the damping characteristics of aircraft, the response times, the handling qualities and so on. The calculation model of the accepted maximum bank angle was constructed based on the assumption that the buffet stall speed was posed as a critical limit in calculating the rolling progress. The rolling parameters and safe intervals of wake vortex under certain wake vortex's field condition were calculated by using DelphiT. 0. The influences of aircraft mass, speed, altitude tolerance and initial bank angle on flight safety were analyzed. Research result shows that at a certain speed, the greater aircraft mass is, the smaller the accepted maximum bank angle is. The safe interval of aircraft with certain mass decreases with the increase of speed and the decrease of altitude tolerance, while it increases with the increase of initial bank angle. Comparing the data calculated by the models with ICAO standard data, the maximal deviation is 1.56%, which verifies the correctness of the computation method.