Influence of the surface roughness on images acquired by flying spot active thermography: Case of the high pressure turbine blades

Author

Maffren, T. ; Lepoutre, F. ; Deban, G. ; Mavel, A. ; Juncar, P.

Author_Institution

Onera - The French Aerosp. Lab., Chatillon, France

fYear

2012

fDate

13-16 May 2012

Firstpage

454

Lastpage

457

Abstract

High pressure turbine blades undergo heavy thermomechanical constraints which drive initiation and propagation of cracks. These cracks can be difficult to detect with the current control equipment. The aim of this study is to develop an active thermography process called flying spot (scanning laser heating) in the 1-2 μm range to inspect the blades. This work is funded by the French Ministry of Defense, DGA through the PhD scholarship program and the contract 2010.60.018.

Keywords

blades; cracks; infrared imaging; inspection; jet engines; surface roughness; turbines; DGA; French Ministry of Defense; PhD scholarship program; crack propagation; current control equipment; flying spot; flying spot active thermography process; high pressure turbine blades; inspection; scanning laser heating; size 1 mum to 2 mum; surface roughness; thermomechanical constraints; Blades; Coatings; Heating; Optical imaging; Rough surfaces; Surface roughness; Surface treatment; Flying spot; HPT blade; SWIR thermography; surface roughness;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International

Conference_Location

Graz

ISSN

1091-5281

Print_ISBN

978-1-4577-1773-4

Type

conf

DOI

10.1109/I2MTC.2012.6229274

Filename

6229274