An investigation into the role of specimen geometry when undertaking tribological testing on seal fin components

Labyrinth seal systems are used in aeroengines to the clearance, understanding of wear mechanism labyrinth system is necessary achieve better sealing performance. In this work a series tests conducted on high-speed test rig capable fin tip speeds 100 m/s. With force and temperature measurements recorded each case, influence specimen geometry investigated. Surface examination debris analysis also performed using microscopy post-test. The was found be influenced by geometry. A discrete observed trigger more efficient material removal at both incursion conditions. Where segment ring-shaped leading increased temperatures smearing. heat dissipate role during where longer contact time abradable gives