Investigating Al-Si base abradable material removal mechanism with axial movement in labyrinth seal system

Modern aeroengines employ labyrinth seal systems to the clearance between blade tip and surrounding engine casing. Understanding of wear mechanism fins abradable coatings on casing is necessary help aeroengine achieve higher efficiency. In this study, multiple tests with different types fin geometries are conducted a high-speed test rig speed 100m/s. Two motorized stages used simulate axial movement in an aeroengine. The investigated over range incursion rates from 2μm/pass 10μm/pass, in-situ force temperature measurements along imaging recorded side each case. surface examination track also employed by using microscopy post-test. main material removal extruding side. Also, adhesion found amount affected both geometry rate.