导叶非均匀布局对气动激励的影响  

Effects of inlet guide vanes asymmetry layouts on aerodynamic excitation

作　　者：郑赟[1] 崔健[1] 高庆哲 金秀博 ZHENG Yun;CUI Jian;GAO Qingzhe;JIN Xiubo(School of Energy and Power Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191

出　　处：《航空动力学报》2022年第11期2627-2635,共9页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅱ-0009-0023)。

摘　　要：导叶非均匀布局是抑制下游转子叶片气动激励的重要方法,对半均分的非均匀布局既能以叶片数为设计参数也能以通道面积为设计参数。推导了对半均分布局下的气动激励理论解,比较了两种设计方案的区别;以某1.5级压气机为例,对比两种非均匀方案下的气动激励特性,分析转子叶片表面非定常气动力的频谱特性,探究激励特性与通道面积的关系,揭示对半均分布局气动激励的分频机理。结果表明:导叶叶排通道面积的变化导致气动激励分频,气动激励具有一定传播规律进而影响转子叶片气动响应幅值分布,两种非均匀方案下气动激励的空间分布和频域特征不同,以通道面积为设计参数时能够获得准确的非均匀激励模式。A key technique for reducing the aerodynamic excitation of downstream rotor blades is the asymmetry layout of inlet guide vanes. The half and half layout divided can be defined in terms of both the number of blades and the vane spacing. This study derives a theoretical solution to aerodynamic excitation with half and half layout and compares the two design schemes’ differences. We compare the aerodynamic excitation properties under two asymmetry schemes using a 1.5-stage compressor as an example,examine the spectral properties of the aerodynamic forces on the rotor blade surface,investigate the relationship between the excitation properties and the vane spacing,and identify the frequency separation mechanism of the aerodynamic excitation for half and half layout. The findings demonstrate that altering the guide vane row’s vane spacing causes the aerodynamic excitation to be frequency divided, the amplitude distribution of the aerodynamic response of rotor blades is affected by the propagation law of aerodynamic excitation, and that the spatial distribution and frequency domain characteristics of the pneumatic excitation differ between the two asymmetry schemes.

关 键 词：导叶非均匀布局 对半均分布局 设计方法 通道面积 激励特性 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]