Further Progress of a cross-correlation based optical strain measurement technique for detecting radial growth on a rotating disk - (PPT)

摘要

Micro-glass bead pattern applied onto an engine turbine-like disk. Micro-glass bead pattern evaluated to ensure still optimal. Two bench-top experiments performed to evaluate the detection of the particle displacements. Manually induced – accurate up to ～1.75% of full scale. Disk with micro-glass bead adhered pattern is evaluated on the spin rig. Micro-glass bead pattern deteriorated after running longer than anticipated. Investigation of alternative method for particle pattern application that does not use the adhesion of physical particles. Vapor blasting created effective particles by roughening up surface. Initial results of a manual translation experiment show promise. Future work to include investigation of effects of larger and additional effective particles using vapor blasting. Perform vapor blast on disk and test on spin rig – Pending.