叶片数对定子噪声和宽带噪声的影响

IF 1.7 4区 物理与天体物理
Xingyu Wu, Yingsan Wei, Shuanbao Jin, Dong Wang, Hao Zhu, Pengfei Hu, Fangxu Sun
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引用次数: 1

摘要

叶栅的响应函数可以有效地处理谐波湍流与叶栅相互作用的非定常响应。基于该函数,本文给出了定子宽带和音调噪声的计算公式,这些噪声的流入模型各不相同。宽带噪声来自于转子尾流中的随机湍流波对定子的影响,而音调噪声来自于周期性转子尾流与定子之间的相互作用。根据两种噪声的预测公式,它们的入流模型不同。通过与亚音速风扇试验模型的比较,验证了宽频带噪声和音调噪声预测模型的正确性。同时,通过预测模型研究了叶片数量对定子音调和宽带噪声的影响,结果表明:(1)叶片数量越多,定子在高频下的宽带声功率水平越高。(2) 叶片数量的增加可以“切断”BPF下定子的音调噪声。因此,合理布置定子和转子叶片的数量对被动抑制定子噪声具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence Due to the Blade Number on the Stator Tonal and Broadband Noise

Influence Due to the Blade Number on the Stator Tonal and Broadband Noise

The cascade’s response function can be used to effectively deal with the unsteady response of the interaction between the harmonic turbulence and the cascades. Based on this function, this paper presents the formulas for the stator broadband and tonal noises, whose inflow models are different from each other. The broadband noise comes from the impact of the random turbulence wave in the rotor wake on the stator, while the tonal noise comes from the interaction between the periodic rotor wake and the stator. According to the formulas for predicating the two kinds of noise, their inflow models are different from each other. Comparing with the test models of subsonic fan, the prediction models of the broadband and tonal noise prove to be correct. Meanwhile, the influence of the blade number on stator tonal and broadband noise is carried out through the prediction models, and the results are summarized that (1) the greater the number of blades, the higher the broadband sound power level of the stator in the high frequency. (2) An increase in the number of blades can “cut off” the tonal noise of the stator at BPF. So, reasonable arrangement of the number of stator and rotor blades is significant to the passive suppression of stator noise.

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来源期刊
Acoustics Australia
Acoustics Australia ACOUSTICS-
自引率
5.90%
发文量
24
期刊介绍: Acoustics Australia, the journal of the Australian Acoustical Society, has been publishing high quality research and technical papers in all areas of acoustics since commencement in 1972. The target audience for the journal includes both researchers and practitioners. It aims to publish papers and technical notes that are relevant to current acoustics and of interest to members of the Society. These include but are not limited to: Architectural and Building Acoustics, Environmental Noise, Underwater Acoustics, Engineering Noise and Vibration Control, Occupational Noise Management, Hearing, Musical Acoustics.
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