Installation effects on axial fans: Combined aeroacoustic and psychoacoustic perspective

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-06-09 DOI:10.1016/j.apacoust.2025.110872

Michail Vourakis , Elias Zea , Mikael Karlsson , Niklas Andersson , Sassan Etemad

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引用次数: 0

Abstract

Low-speed axial fans for engineering cooling applications are often operating in the vicinity of humans. Over the last decades, an effort to mitigate fan noise has been observed. Novel fan designs with substantial noise abatement and little to no expense on aerodynamic performance have been achieved. However, the case of unfavorable installation conditions, namely fans immersed in non-ideal inlet flows, still complicates the optimization of fan designs with regard to acoustic performance. In this study, the acoustic performance alteration of a low-speed axial fan with a rotating ring is documented. Different inlet geometries are tested, while the fan aerodynamic performance is also monitored. The acoustic performance of the fan, including sound power and sound quality metrics, is discussed for three operating points. Furthermore, a parallel fan setup is tested to study the emergence of acoustic interference. Results show marginal gains in aerodynamic performance for elongated inlet geometries. On the contrary, acoustic performance and sound quality are negatively affected, particularly at high loading. Moreover, the inlet configuration with an elongated straight duct demonstrates weak coupling to loading conditions concerning sound power and roughness. An overall consistent scaling of aerodynamic and acoustic performance is observed for the parallel fan system when compared to the single fan case, irrespective of inlet geometry. Sound quality estimates of two incoherent sound sources agree well with measured values of the parallel fan system, apart from fluctuation strength, which is overestimated at stall conditions.

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轴流风机的安装效果：气动声学与心理声学的结合

用于工程冷却应用的低速轴流风扇经常在人类附近运行。在过去的几十年里，已经观察到减少风扇噪音的努力。新颖的风扇设计具有显著的降噪效果，并且在气动性能上几乎没有任何损失。然而，在不利的安装条件下，即风扇沉浸在非理想的进口气流中，仍然使风扇设计的声学性能优化变得复杂。在这项研究中，记录了带旋转环的低速轴流风机的声学性能变化。测试了不同的进气道几何形状，同时也监测了风扇的气动性能。讨论了风机三个工作点的声学性能，包括声功率和音质指标。此外，我们还测试了一个平行的风扇装置来研究声干扰的产生。结果表明，加长进气道几何形状在气动性能上有边际收益。相反，声学性能和音质受到负面影响，特别是在高负荷下。此外，带有细长直导管的进口结构与声功率和粗糙度有关的加载条件耦合较弱。与单扇相比，无论进口几何形状如何，平行风扇系统的空气动力学和声学性能总体上一致。两个非相干声源的音质估计值与并联风机系统的测量值吻合较好，但波动强度在失速条件下被高估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.