| 引用本文: | 江竺沈1 ,张明德1 ,刘立飞1 ,谢 乐2 ,陈星宇1.航空发动机叶片表面微小损伤修复目标型面再设计方法(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2025，42（2）：33-40 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
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| 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。 |
| 关键词: 模型重构 NURBS 插值重构 空气动力学 叶片修复 |
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| Redesign Method of Target Surface for Repairing Minor Damage on Aeroengine Blade Surface |
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JIANG Zhushen1 ZHANG Mingde1 LIU Lifei1 XIE Le2 CHEN Xingyu1
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1. College of Mechanical Engineering Chongqing University of Technology Chongqing 400054 China
2. Chongqing Miaoqifeng Technology Co. Ltd. Chongqing 400054 China
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| Abstract: |
| 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 reconstruction method considering both NURBS and
aerodynamics is proposed. It is experimentally proved that NURBS curves and reconstructed repair models with better fluid
properties can be obtained which is of certain significance for the comprehensive development of damaged blade repair. |
| Key words: model reconstruction NURBS interpolation reconstruction aerodynamics blade repair |
