| Bird-strike test of gas turbine rotating fan blade is performed in the vacuum chamber based on the airworthiness standards. After test, the inspection shows that the fan blades are seriously damaged, including blade fracture, leading edge tear, pitting, curl, shoulder misalignment, overlapping and chipping, etc. Furthermore, the impact process is simulated by PAM-CRASH software, and the simulation result shows that the bird-strike mode, impact process and damage mode of blades and shrouds agree quite well with the test result. The prediction of the most serious damage level is the same with the test result; however, the number of damaged blades is less than that in the test. The anti-impact evaluation test and simulation reveal that the fan blades under investigation are seriously damaged, however, there is no high energy debris released from the rotor, which is still under the control within the containment requirement of the fan casing. The proposed method in test and simulation can be utilized as reference when performing similar fan blade bird-strike test. |
