Abstract: In order to accurately predict the flight conflict risk of aircraft in the airport terminal and use the low-altitude airspace resources to the full, a model was built for predicting risk of aircraft flight conflict in airport terminal after integrating the transport aircraft trajectory model considering the acceleration and the random trajectory model of general aircraft. The model was applied to a certain airport in China. A program was complied,by using the C language,for the simulation.The aircraft trajectories within 20 km range of the terminal centered on the runway were simulated by computer. The risk of flight conflict was predicted for different traffic zone settings. The activity areas for general aircrafts near the terminal were determined by the computer simulation. The result shows that the flight conflict risk between the general aircraft and the transport aircraft is low than 2×10^-5 for a aircraft taking-off or landing and meets the acceptable level of safety, when the flying height is limited to 1 000 m and the low-altitude airspace is designated as a monitoring airspace under no control.

Key words: general aviation, risk profile, computer simulation, terminal area, flight collision risk