航空发动机叶片表面微小损伤修复目标型面再设计方法  

Redesign Method of Target Surface for Repairing Minor Damage on Aeroengine Blade Surface

作　　者：江竺沈 张明德 刘立飞 谢乐 陈星宇 JIANG Zhushen;ZHANG Mingde;LIU Lifei;XIE Le;CHEN Xingyu(College of Mechanical Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing Miaoqifeng Technology Co.,Ltd.,Chongqing 400054,China)

机构地区：[1]重庆理工大学机械工程学院,重庆400054 [2]重庆妙奇丰科技有限公司,重庆400054

出　　处：《重庆工商大学学报(自然科学版)》2025年第2期33-40,共8页Journal of Chongqing Technology and Business University:Natural Science Edition

基　　金：重庆市高校创新研究群体项目(CXQT20022);重庆市教委科学技术研究项目(KJZD-M202301101);重庆市研究生科研创新项目(CYS23708).

摘　　要：目的针对目前损伤叶片的模型重构修复方法主要是增材制造(激光烧焊填充)的传统方式,提出一种新的适用于减材制造(磨削、铣削)的损伤叶片的模型重构修复方法,并将模型重构问题转化为最优化问题。方法首先,划定叶片的损伤区域并导出损伤区域的相应损伤截面线;其次,将损伤模型与理论模型进行配准,输出损伤模型的损伤截面线对应理论模型的理论型线,采用NURBS和空气动力学相结合的曲线插值重构方法建立目标函数模型并求解,从而把理论型线与损伤模型的未损伤型线进行光顺衔接;最后,将重构修复的每层截面线与其他未损伤截面线进行放样建模得到重构模型并进行仿真流体力学验证。结果实验结果表示:经过重构修复的损伤叶片升力得到约1.5%的提升,这表明适用于减材制造的损伤叶片表面重构修复方法是能够起到修复作用的;另外,其他参数如速度和湍流动能也有一定的提升,且压力分布有一定程度的降低,图像显示速度和湍流动能主要集中在叶片的前后缘两处,而压力主要集中在先与来流空气接触的前缘,为叶片提供升力。结论从减材制造的角度出发,提出一种同时考虑NURBS和空气动力学的叶片模型重构方法,经过实验证明确实可以得到流体性能更优的NURBS曲线和重构修复模型,对损伤叶片修复的全面发展具有一定的促进意义。Objective Since the current model reconstruction and repair method for damaged blades is mainly the traditional method of additive manufacturing(laser weld filling),a new model reconstruction and repair method for damaged blades with subtractive manufacturing(grinding and milling)was proposed,and the model reconstruction problem was transformed into an optimization problem.Methods Firstly,the damage region of the blade was delineated and the corresponding damage cross-section lines of the damage region were derived.Secondly,the damage model was aligned with the theoretical model,and the theoretical profile lines of the theoretical model corresponding to the damage cross-section lines of the damage model were output.The objective function was modeled and solved using a curve interpolation reconstruction method combining NURBS and aerodynamics so that the theoretical profile lines can be smoothly connected with the undamaged profile lines of the damage model.Finally,the reconstructed model was obtained by lofting and modeling each layer of the reconstructed and repaired cross-section lines with other undamaged cross-section lines,and simulated hydrodynamics verification was carried out.Results The experimental results showed that the lifting force of the damaged blade after reconstruction and repair was improved by about 1.5%,which indicated that the reconstruction and repair method of the damaged blade surface applicable to the material reduction manufacturing could be useful for the repair.In addition,other parameters,such as velocity and turbulent kinetic energy,were also improved to some extent,and the pressure distribution was reduced to some extent.The images showed that the velocity and turbulent kinetic energy were mainly concentrated at the leading and trailing edges of the blade,while the pressure was mainly focused at the leading edge that contacted the incoming air first,which provided the lifting force for the blade.Conclusion From the perspective of subtractive manufacturing,a blade model reconstructi

关 键 词：模型重构 NURBS 插值重构 空气动力学 叶片修复 

分 类 号：TH16[机械工程—机械制造及自动化]