Research On Aero-engine Blade Containment Test And Computational Simulation

The article mainly researched into the blade containment in the aero-engine. To eliminate blade uncontained failure, impaction and deformation and fracture of engine components should be firstly understood through the blade containment experiment. Blade containment tests used models and real components were done on the high-speed spin tester. A special trigger action system was designed using high-speed camera and high-speed data acquisition system. Rotor speed and motion of the released blade were all recorded at and after the blade impact on the inner wall of the containment ring. Test results clearly show that deformation and failure of the containment ring and the blade are dominated by length and kinetic energy of the released blade. The impaction of long blade with high energy can cause large deformation and the blade will curl as U shape and tear the wall of the containment ring at the second impact position. On the contrary, the ring causes lesser failure if the blade is short even if kinetic energy is high. Blade containment test can supply wealthy data which are useful for structure optimization and development of blade containment simulation software.Some sets of experiment were selected to build the model in Msc.Dytran according to test data. The results coincidence validates the feasibility of prediction of blade containment capability and design new containment structures using simulation. Base on the structure plastic dynamic response analysis and blade deformation process analysis, the factors such as length of blade, rotate speed of breaking were considered. Based on the process of energy absorption and distribution between blade and shell, the mechanism of blade with high-speed impacting containment ring was further understood.The model was built in the article can be adapted to the containment with different material, rotate speed and structure. A new method researching on the containment was put forward for reducing the fee of experiments and shortening the time on research and development. The results of study are of great importance and wide applied prospect in the design of aero-engine.