Sound Generation in Centrifugal Compressors
Sound Generation in Centrifugal Compressors
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DOI：
10.1016/j.jsv.2008.01.034
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发表时间：
2006-05
影响因子：
4.7
通讯作者：
T. Raitor;W. Neise
中科院分区：
文献类型：
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作者：
T. Raitor;W. Neise
通过实验研究，探讨了离心式压缩机噪声谱成分的主要发声机理。在设计速度和转子叶片通道中的超音速流动条件下，叶片音调噪声和嗡嗡声是主要的贡献者。在进口侧，单独的转子噪声是主要的噪声源，而在出口侧，在叶片出口扩散器的情况下，转子-定子干涉噪声占主导地位。在亚音速气流条件下，在大范围的转子速度范围内，径向压缩机噪声主要由叶尖间隙噪声控制，叶尖间隙噪声是由通过转子叶片叶尖和机匣壁之间的差距的二次流产生的，这又引起了早先在轴流式机器中观察到的旋转不稳定现象。
An experimental study is described to explore the dominant sound generation mechanisms of the spectral components governing the overall noise level of centrifugal compressors. At the design speed with supersonic flow conditions in the rotor blade channels, blade tone noise and buzz-saw noise are the main contributors. On the inlet, rotor-alone noise is the main source while rotor–stator interaction noise dominates on the outlet side in case of vaned outlet diffusers. Over a large range of rotor speeds with subsonic flow conditions, radial compressor noise is dominated by tip clearance noise which is produced by the secondary flow through the gap between rotor blade tips and the casing wall which in turn gives rise to the rotating instability phenomena observed earlier in axial-flow machines.