二次元翼におけるサンドエロージョン予測

抄録

Sand erosion is a phenomenon wherein solid sand particles impact on materials causing damage to the material surface. Aircraft jet engine is exposed to many particles from takeoff to landing, because sucking in a considerable amount of air and sand. Aircraft jet engine operating under such an environment suffer from degraded performance and have a shorter lifespan. Therefore, it is necessary to estimate the amount of damage caused due to the shape and material of the aircraft engine airfoil at the design stage. In this study, a sand erosion prediction method for evaluating the lifespan of engine structural material was proposed. First, sand erosion experiments in which the erosion rate was calculated by varying the impact velocity and impact angle for the A7075-T7351 and Ti-6Al-4V plates were conducted. Second, the erosion rate on the surface was predicted by applying the erosion rate equation to a two-dimensional airfoil. Subsequently, erosion rates of the calculated A7075-T7351 and Ti-6Al-4V two-dimensional airfoil were examined and compared. Finally, the validity of the prediction was confirmed by a verification experiment.