RESEARCH ON THREE DIMENSIONAL INDUSTRIAL CT METHOD FOR NDT/E OF AEROENGINE TURBINE BLADES
Implementing the standards on aeroengine structural integrity can improve the reliability and wearability of aeroengines. Non-destructive testing and evaluation (NDT/E) has been one of the research directions of aeroengine structural integrity assessment. Three dimensional industrial X-ray computed tomography(3D-ICT) can provide the internal structure information of objects with digital images and play an important role for NDT/E of aeroengines. However, the 3D-ICT image quality of turbine blades is greatly degraded by the scatter and the beam hardening caused by the high-density materials and the irregular shape of turbine blades. In order to apply 3D-ICT to NDT/E of turbine blade, this paper made some researches to improve the image quality. Firstly the properties of scatter were analyzed and a correction method based on the dyadic wavelet transform was researched. Then the physics features of beam hardening were summarized and a correction method based on the projections was presented. Finally a wall-thickness measurement method based on CT images was developed. The measurement results were presented and the accuracy reached 0.1mm. Based on these research results, a 3D-ICT system was developed for a Chinese aeroengine company and satisfied NDT/E requirements of turbine blades.
FU JIAN WEI DONGBO SHAO JUNMING LI BIN
Beihang Univerisity, School of mechanical engineering and automation, Beijing, 100083, China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）