In the performance test of a compressor, the overstrain alarm of a rotor blade occurred and it was thought to be caused by a large-sized inlet probe. To explain and further avoid the occurrence of this phenomenon, the influences of probe strut configuration on the vibration strain of the compressor rotor blade and the corresponding flow mechanism are studied by using a one-way fluid-structure coupling calculation method. Firstly, the probe strut is simplified as a cylinder with a diameter of 10 mm and located upstream of the inlet stator with the strut wake impinging on the stator blade according to the compressor test. Then, the three scenarios are considered: moving the strut away from the stator blade in axial direction, shifting the strut half of the stator pitch circumferentially, and reducing the strut diameter. The analysis results show that the characteristics of blade vibration are determined by the excitation force on the rotor blade. Under the interaction between the large-sized strut and the compressor, in addition to the excitation force with the strut passing frequency, a force with a lower frequency, namely, the strut-wake-induced frequency, is also observed. The amplitude of the excitation force on the rotor blade depends on the probe configuration. When one of the excitation force frequencies is close to a natural frequency of the rotor blade, the blade resonates, and the amplitude of blade strain varies with the amplitude of the excitation force. In order to reduce the adverse effect of upstream strut wake on the compressor rotor blade vibration, the inlet probe strut should be designed with a smaller diameter and be placed further upstream of the stator in such a way that the strut wake vortex passes through the midpassage of the following stator.

中文翻译：

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不同进气道结构下压气机转子叶片振动流动机理的数值研究

在压缩机的性能测试中，发生了动叶片超负荷报警，并且认为这是由大型入口探头引起的。为了解释并进一步避免这种现象的发生，采用单向流固耦合计算方法研究了探针支撑结构对压缩机转子叶片振动应变和相应流动机理的影响。首先，探针压杆简化为直径为10 mm的圆柱体，并位于入口定子的上游，根据压缩机测试，压杆尾流撞击在定子叶片上。然后，考虑以下三种情况：沿轴向方向将支撑杆从定子叶片移开，将支撑杆螺距的一半沿周向移动，并减小支撑杆直径。分析结果表明，叶片振动的特性取决于转子叶片上的激振力。在大型支柱和压缩机之间的相互作用下，除了具有支柱通过频率的激振力以外，还观察到具有较低频率的力，即支柱唤醒频率。转子叶片上的激励力的幅度取决于探头的配置。当激振力频率之一接近转子叶片的固有频率时，叶片共振，并且叶片应变的振幅随着激振力的振幅而变化。为了减少上游支柱尾流对压缩机转子叶片振动的不利影响，