Experiment and numerical simulation on bird strike with blades of an engine primary compressor

Abstract

Bird striking engines are most likely to cause aircraft damage and accidents in bird strike accidents. In order to study the bird strike airworthiness performance of the first stage compressor rotor of the engine, bird strike tests are conducted on the engine rotor under working conditions. The bird strike test, in which the bird weight, velocity and rotate speed of engine blades are 1 000 g, 195 m/s, 8 525 r/min respectively, is made in a vacuum space. Based on the explicit collision dynamics analysis software PAM-CRASH, a corresponding blade bird strike numerical calculation model is established, and the rationality of the calculation model in this paper is verified by comparing it with experimental results. Also, the ability of engine blades against bird strike in different situations is researched. The results indicate that big bird strike leads to a worse situation compared with medium bird flock and small bird lock. Large deformation appears at the tip of the blades due to the impact at the tip part, while impact at the root and middle of the blades will cause a large concentrated stress around the root of blades, and lead to the fracture of the blade.

Keywords

• engine blades
• bird strike test
• pam-crash software
• numerical simulation
• airworthiness