轴向间距变化及涂层对高压涡轮叶片振动的影响

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (9) : 322-327.

论文

程前1，王虎1，沈莲1，张根1，赖巍1，曹正2

作者信息 +

Effects of axial spacing variation and coating on vibration of high-pressure turbine blades

CHENG Qian1, WANG Hu1, SHEN Lian1, ZHANG Gen1, LAI Wei1, CAO Zheng2

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文章历史 +

摘要

为了研究不同轴向间距及涂层对涡轮叶片振动响应的影响，采用SST（shear stress transportation）湍流模型对高压涡轮导叶尾迹作用下的某高压涡轮转子叶片非定常流动进行数值模拟。通过对时域叶片表面压力载荷进行FFT频域分解获取激振力的谐波分量，建立了三维非定常流场激励下特定振动模态的涡轮叶片强迫响应分析模型，利用压力扰动均方根有效值作为气动激励强度的量化参数以及获取流场激励下的叶片幅值响应，对比了不同轴向间距、考虑有无涂层的叶片振动响应差异。结果表明：在保持进气条件不变时，存在叶片振动响应幅值随轴向间距的增加而减弱的趋势，即轴向间距的增加能有效降低叶片的振动应力；叶片涂层亦有助于降低叶片的振动响应幅值。

Abstract

In order to study the effects of different axial spacing and coatings on the vibration response of turbine blades, the unsteady flow of high-pressure turbine blade under the action of turbine guide vane wake is numerically simulated. The harmonic component of the airflow exciting force is obtained by FFT, which can get the harmonic pressure on the blade surface load through frequency domain decomposition, and combined with the blade forced response analysis method, The forced response analysis method of blade under three-dimensional unsteady flow field excitation is established. The root mean square of pressure disturbance is used as the quantitative parameter of aerodynamic excitation intensity, and the vibration response amplitude of blade under flow field excitation is obtained. The vibration response differences of blade with different axial spacing are compared, and considering the coating influence . The results show that the amplitude of blade vibration response decreases with the increase of axial spacing, that is, the increase of axial spacing can effectively reduce the vibration stress of blade; The blade coating also helps to reduce the vibration response amplitude of the blade.

导出引用

程前1，王虎1，沈莲1，张根1，赖巍1，曹正2. 轴向间距变化及涂层对高压涡轮叶片振动的影响[J]. 振动与冲击, 2023, 42(9): 322-327

CHENG Qian1, WANG Hu1, SHEN Lian1, ZHANG Gen1, LAI Wei1, CAO Zheng2. Effects of axial spacing variation and coating on vibration of high-pressure turbine blades[J]. Journal of Vibration and Shock, 2023, 42(9): 322-327

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