Title :
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
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International
Conference_Location :
Graz
Print_ISBN :
978-1-4577-1773-4
DOI :
10.1109/I2MTC.2012.6229274
