Experimental and numerical analysis study on the low and medium speed bird strike

Abstract

The bird impact process of civil aircraft mostly occurs in the takeoff and landing phases. The movement speed of the aircraft in these phases belong to the category of low and medium speed, and the bird will not disintegrate in this velocity range. The speed and direction of the bird after impacting with the air intake directly affects the damage to the aero-engine. According to the preliminary experimental data, we developed a bird strike trajectory prediction model based on the quasi-linear viscoelastic model. This model reproduced the trajectory change law in the low and medium speed bird impact experiment combining with the simulation analysis under multiple conditions. We designed a simulated air intake model for the real air intake structure characteristics, and processed the simulated air intake parts based on this model. The accuracy of the model was further verified by comparing the simulated and experimental bird impact trajectories, and a predictive modeling method was obtained for the simulation of low and medium speed bird impact trajectories.