The commercial gas turbines of Mitsubishi Heavy Industries Ltd. (MHI) are not only high
efficiency, but also designed based on the data accumulated through component tests and field
tests, placing importance also on product reliability to assure our clients the safer and securer use
of our products. In particular, the first-stage rotor blades of gas turbines are used in an extremely
severe environment, that is, one with high temperature, strong centrifugal force and the greatest
load. Therefore, it is important to demonstrate the validity of their vibration characteristics under
actual operating conditions, from the viewpoint of blade damage prevention. In order to obtain
more data on vibrations of the first-stage rotor blades of gas turbines in the environment of actual
use, Mitsubishi Heavy Industries, Ltd. (MHI) has developed a non-contact blade vibration
measurement technology that can be applied under high temperature gas conditions.
