Abstract: A novel method for accurate estimation of axial compressor blade shape during operation is presented based on fluid-structure coupling iterative algorithm，considering the effects of centrifugal and aerodynamic force on the blade deflection. During the blade configuration transformation，the blade nodal displacements are calculated using the force loadings and stiffness matrix of deformed blade. It is capable of accounting for the nonlinear force loadings and variable stiffness due to the blade deformation. The hot blade profile that satisfies the required precision is obtained by modifying nodal coordinates iteratively. The method is used to reconstruct the operating shape of Stage 37 rotor blade. The hot blade shape can be obtained within 20 iteration steps. The maximum residual is less than 10-4mm. Comparison with experimental results shows that the reconstruction method is reliable and practical in engineering.

Key words: Compressor；Blade reconstruction；Fluid-structure interaction；Variable stiffness

摘要： 为能准确预估轴流压气机叶片在工作状态下的形状，基于流固耦合迭代策略，考虑离心力和气动力对叶片变形的作用，发展了一种适用于轴流压气机的叶型重构方法。在构型转化过程中，计入了叶片受力载荷随叶型变化的非线性效应以及叶片的变刚度特性。采用叶片变形后状态的受力载荷与刚度矩阵计算叶片节点位移，反复迭代修正热态叶片形状，最终获得满足精度要求的热态叶型数据。利用所提出的方法，对Stage 37的转子叶片进行了叶型重构，经20步迭代计算可获得最大残差小于10-4mm量级的热态叶型，通过与试验数据的对比分析，验证了重构算法的可靠性和工程实用性。

关键词: 压气机；叶型重构；流固耦合；变刚度特性