Analysis of Tonal Noise Generating Mechanisms in Low-Speed Axial-Flow Fans
文献类型：期刊论文
| 作者 | Canepa, E., Cattanei, A. and Zecchin, F. M.1 |
| 出版日期 | 2016 |
| 关键词 | Axial-flow fans Tonal noise Acoustic response turbomachines turbulence sound Thermodynamics Engineering |
| 中文摘要 | The present paper reports a comparison of experimental SPL spectral data related to the tonal noise generated by axial-flow fans. A nine blade rotor has been operated at free discharge conditions and in four geometrical configurations in which different kinds of tonal noise generating mechanisms are present: large-scale inlet turbulent structures, tip-gap flow, turbulent wakes, and rotor-stator interaction. The measurements have been taken in a hemi-anechoic chamber at constant rotational speed and, in order to vary the acoustic source strength, during low angular acceleration, linear speed ramps. In order to avoid erroneous quantitative evaluations if the acoustic propagation effects are not considered, the acoustic response functions of the different test configurations have been computed by means of the spectral decomposition method. Then, the properties of the tonal noise generating mechanisms have been studied. To this aim, the constant-Strouhal number SPL, obtained by means of measurements taken during the speed ramps, have been compared with the propagation function. Finally, the analysis of the phase of the acoustic pressure has allowed to distinguish between random and deterministic tonal noise generating mechanisms and to collect information about the presence of important propagation effects. |
| 源URL | [http://ir.etp.ac.cn/handle/311046/113063]  |
| 专题 | 工程热物理研究所_Journal of Thermal Science_期刊论文 |
| 作者单位 | 1.[Canepa, Edward 2.Cattanei, Andrea 3.Zecchin, Fabio Mazzocut] Univ Genoa, DIME, Via Montallegro 1, I-16145 Genoa, Italy. |
| 推荐引用方式 GB/T 7714 | Canepa, E., Cattanei, A. and Zecchin, F. M.. Analysis of Tonal Noise Generating Mechanisms in Low-Speed Axial-Flow Fans[J],2016. |
| APA | Canepa, E., Cattanei, A. and Zecchin, F. M..(2016).Analysis of Tonal Noise Generating Mechanisms in Low-Speed Axial-Flow Fans.. |
| MLA | Canepa, E., Cattanei, A. and Zecchin, F. M.."Analysis of Tonal Noise Generating Mechanisms in Low-Speed Axial-Flow Fans".(2016). |
入库方式： OAI收割
来源：工程热物理研究所
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