Investigation of flight test crew aerial emergency egress trajectory from civil aircraft in low speed wind tunnel

Flight test crew emergency egress traj ectory experiments were conducted in 3 m × 2.5m low speed wind tunnel (NH-2)at NUAA,in order to assess and validate the airworthiness of the initial emergency egress concept for certain civil aircraft.Scaled models bearing similar shape,weight and moment of inertia to real flight test crew were designed,and high speed camer-as were used to capture the egress trajectories of these scaled models carrying parachutes.Conse-quently,the safety of the trajectory was analyzed,and effects of different parameters on the traj-ectory were investigated as well.Test results demonstrate that the initial emergency egress con-cept of certain civil aircraft is not safe,and some trajectories run into the starboard main landing gear and nacelle.In addition,the influence of the flight altitude,the flight speed,the egress speed and the anti-airflow device on the aerial emergency egress trajectory are found to be signifi-cant.This investigation could be utilized in the design of aerial emergency egress concept and airworthiness validation for civil aircraft.