航空发动机涡轮叶片DR检测工艺参数优化  

Optimization of DR detection process parameters for aero-engine turbine blades

作　　者：俞梦倩 吴伟[1] 邬冠华[1] 夏志风 傅伟成 YU Mengqian;WU Wei;WU Guanhua;XIA Zhifeng;FU Weicheng(Key Laboratory of Non-destructive Testing Technology,Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China;Shenyang Liming Aeroengine Corporation Limited,Aero Engine Corporation of China,Shenyang 110043,China)

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063 [2]中国航发沈阳黎明航空发动机有限责任公司,沈阳110043

出　　处：《航空动力学报》2023年第8期1837-1845,共9页Journal of Aerospace Power

基　　金：国家自然科学基金(62161030)。

摘　　要：针对工业领域数字射线(DR)快速选定检测工艺参数获取高信噪比图像的需求,研究DR检测中多因素工艺参数不同组合对成像结果的影响。以航空发动机涡轮叶片同材料等效厚度试块为对象,采用二次回归正交旋转实验方法,建立检测图像信噪比与管电压、管电流、积分时间、不同等效厚度之间的二次回归方程模型,并检验单因素及各因素间交互作用对检测图像信噪比的显著性。利用人工刻槽航空发动机涡轮叶片结合回归方程模型,以检测图像信噪比为优化指标,在已知透照厚度情况下得到最佳工艺参数组合,比较检测图像信噪比的实际值与计算值。结果表明:在4组验证实验下实际信噪比值与计算值比较接近,误差范围在1.4%~5.5%,表明模型具有较高的可靠性。In view of the needs of digital radiography(DR)in the industrial field to quickly select the detection process parameters to obtain high signal-to-noise ratio images,the influences of different combinations of multi-factor process parameters on the imaging results in DR detection were studied.Taking the aero-engine turbine blade as the object,the quadratic regression orthogonal rotation test method was used to establish the quadratic regression equation model between the detection image signal-to-noise ratio and the tube voltage,tube current,integration time,and different equivalent thicknesses,and the single test was carried out.The significance of the factors and the interaction among the factors on the detection image signal-to-noise ratio were also discussed.Using the manual slotted aero-engine turbine blade combined with the regression equation model,the detection image signal-to-noise ratio was used as the optimization index,the optimal combination of process parameters was obtained under the condition of known translucency thickness,and the actual value and calculated value of the signal-to-noise ratio of the detected image were compared.The results showed that the actual signal-to-noise ratio was close to the calculated value under four sets of verification tests,and the error range was 1.4%—5.5%,indicating the high reliability of the model.

关 键 词：数字射线检测 信噪比 航空发动机涡轮叶片 二次回归正交旋转组合设计 工艺参数 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]