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针对叶片故障的原因颤振问题,基于计算流体动力学/计算结构力学(CFD/CSD)耦合算法,研究了压气机典型叶片的流固耦合(FSI)问题及颤振特性.使用有限体积法求解非定常三维Navier-Stokes方程和有限元法求解三维结构体模型,在两个求解器间由载荷转换、网格变形传递和同步化方法完成数据交换及求解.以高性能风扇NASA(National Aeronautics and Space Administration)Rotor 67为例,对其工况下的气弹响应进行分析,计算结果与实验数据进行对比,以确认方法的正确性和有效性.结果表明可根据循环功和平均压力分布来分析叶片的颤振机理,从而为压气机稳定性的判定提供重要依据.
Aiming at the flutter of the cause of blade failure, the fluid-structure interaction (FSI) and flutter characteristics of the typical compressor blades were studied based on computational fluid dynamics / computational structural mechanics (CFD / CSD) coupling algorithm. The finite volume method Unsteady three-dimensional Navier-Stokes equations and finite element method for solving three-dimensional structural body model, the data exchange and solution are completed between two solvers by load conversion, grid deformation transfer and synchronization method. The high performance fan NASA (National Aeronautics and Space Administration) Rotor 67 as an example, the aeroelastic response under the working conditions is analyzed, and the calculated results are compared with the experimental data to confirm the correctness and effectiveness of the method.The results show that the method can be analyzed according to the circulating work and the average pressure distribution Flutter mechanism of the blade, so as to provide an important basis for the judgment of the stability of the compressor.