A Study on the Application Infrared Thermography Camera for the 7FA Gas Turbine Blade Covering Crack Detecting

Abstract:

In this investigation, we evaluated diagnoses of a defect concerning coating of land-base gas turbine using infrared thermography camera. In this camera method has a strong point which is able to save time and costs compared with former method. Because it can be long field acquire temperature distribution by using non-contact method. But it has a week point that method applies thermal load about inspection sample. Presently, Method used widely in detection of crack is ultrasonic inspection. But this method, There is problem in application in place that uneven surface. In order to check cracks on a blade coating of a gas turbine, a part with cracks in a waste blade disposed after having been used in the field was extracted to produce a sample. So we apply the method by a infrared thermography camera to the produced sample, the sample was heated by means of a halogen lamp. In this paper, we want to describe production of land-base turbine sample, a method of applying thermal load at produced sample, infrared thermography camera technique, an analysis technique of thermography, a defect analysis of coating of land-base gas turbine blades.

• Periodical: Key Engineering Materials (Volumes 340-341)
• Pages: 483-488
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.340-341.483
• Online since: June 2007
• Authors: Choul Jun Choi, Jae Yeol Kim, Dong Jo Yang, Kyung Seok Song, Yeon Shik Ahn
• Keywords: 7FA Gas Turbine, Blades Covering Crack, Infrared Thermography Camera

References

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