THE USE OF LASER INTERFEROMETER TO STUDY THE TEXTURE AND WEAR OF A PRESERVED BLADES MATERIAL

Abstract

The works carried out until now have shown how certain parameters act on the wear of turbine blades when they touch the protective seal material. This material is used to replace the airtight labyrinths installed on the rotor and on the turbine internal casing. It is obtained by the process of thermal spraying (Atmospheric Plasma Spraying) and it is projected and deposed on the internal turbine envelop. It is used to protect the blades when it tore very easily without causing intense wear of the blades tip. In this work we showed how the surface of this material become in terms of operating parameters, what is its texture, and especially what are the different values of roughness parameters by linking it to the blades wear. The results obtaining by modelling using the method of experiments design are shown in the results part with detailed interpretations of the obtained graphs and curves.

http://dx.doi.org/10.5755/j01.mech.17.4.577