显微CT涡轮叶片重建质量优化方法

Study on quality optimization of turbine blade reconstruction based on micro CT

针对航空发动机叶片厚度不均,内部结构复杂造成的CT检测重建质量差的问题,以某型内部含有裂纹的涡轮叶片为研究对象,设计不同的扫描参数,进行不同扫描参数下的CT扫描与重建,实现了叶片轮廓的三维可视化,讨论透照管电压和管电流、伪影抑制算法、投影图像数量、图像滤波对重建质量的影响,通过研究和评价涡轮叶片的成像质量,实现叶片轮廓的高质量三维成像,推动显微CT技术在叶片检测上的应用。

In order to solve the problem of poor CT detection and reconstruction quality caused by uneven thickness of aero-engine blades and complex internal structure,a certain type of turbine blade with internal cracks was used as the research object.Different scanning parameters were designed and CT scans under different scanning parameters were conducted.With reconstruction,the three-dimensional visualization of the blade profile was realized.The effects of transillumination tube voltage and tube current,artifact suppression algorithm,number of projected images,and image filtering on the reconstruction quality were discussed.By studying and evaluating the imaging quality of turbine blades,the blade profile was realized High-quality threedimensional imaging promotes the application of micro-CT technology in blade inspection.