基于红外热像技术的涡轮叶片损伤评价研究进展
收稿日期: 2015-01-19
修回日期: 2015-04-07
网络出版日期: 2015-04-13
基金资助
国家"973"计划(2011CB013401)
Research progress of damage estimation for turbine blades based on infrared thermographic technology
Received date: 2015-01-19
Revised date: 2015-04-07
Online published: 2015-04-13
Supported by
National Basic Research Program of China(2011CB013401)
主动红外热像技术作为一种新型无损检测手段,具有高效率、无污染、易操作等特点,适合用于材料表面和近表面缺陷检测,因此在叶片类薄壁零件损伤评价方面有一定优势。当前基于主动红外热像无损检测技术的高温涡轮叶片损伤评价研究主要集中于热障涂层厚度检测、涂层脱粘检测、涂层界面处热生长氧化物检测以及叶片基体疲劳裂纹检测4个方面。但现有研究仍然面临热激励理论不完善、红外热像仪识别精度不够高以及热图处理方法有待改进等主要问题和困难。随着这些理论问题和技术困难的解决,主动红外热像技术呈现出人工识别缺陷向自动识别发展、定性检测向定量检测发展的趋势。总体而言,该技术未来在涡轮叶片损伤评价方面具有较大的应用潜力。
郭伟 , 董丽虹 , 王慧鹏 , 徐滨士 . 基于红外热像技术的涡轮叶片损伤评价研究进展[J]. 航空学报, 2016 , 37(2) : 429 -436 . DOI: 10.7527/S1000-6893.2015.0098
As a new non-destructive testing technology with characteristics of high efficiency, non-pollution and easy to operate, active infrared thermography is suitable for surface and subsurface defect detecting, therefore it has some advantages for damage evaluation of thin-walled parts such as turbine blades. Currently, damage evaluation research for high-temperature turbine blades based on active infrared thermography mainly focuse on four aspects:detection of fatigue crack in blade base material, testing of thermal grown oxide in the interface, thickness measurement and debonding detection of thermal barrier coatings. However, there are some problems and difficulties for existing research, such as the thermal excitation theory is still imperfect, the recognition accuracy of thermal infrared imager is not high enough, and processing methods of thermal images need to be improved. With the resolve of these theoretical and technical problems, active infrared thermography showing two development trends:from artificial to automatically recognition, and from quantitative detection to qualitative detection of defects. Overall, this technology has a large potential on damage evaluation of turbine blades in the future.
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