Numerical and experimental study on rotor-stator interaction noise of an axial fan

NIU Xiaofei; WANG Xunnian; LI Yong

doi:10.7638/kqdlxxb-2020.0145

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Numerical and experimental study on rotor-stator interaction noise of an axial fan

更新时间：2026-05-28

- Numerical and experimental study on rotor-stator interaction noise of an axial fan
- Vol. 39, Issue 5, Pages: 44-52(2021)
- 作者机构：
  
  1. 温州大学机电工程学院,温州,325035
  2. 中国空气动力研究与发展中心空气动力学国家重点实验室,绵阳,621000
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2020.0145
  CLC： TK83
- Published：2021
- 稿件说明：
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牛晓飞, 王勋年, 李勇. 轴流风扇动/静干涉噪声抑制的数值模拟与实验研究[J]. 空气动力学学报, 2021, 39(5): 44−52.

NIU Xiaofei, WANG Xunnian, LI Yong. Numerical and experimental study on rotor-stator interaction noise of an axial fan[J]. 2021, 39(5): 44-52.
牛晓飞, 王勋年, 李勇. 轴流风扇动/静干涉噪声抑制的数值模拟与实验研究[J]. 空气动力学学报, 2021, 39(5): 44−52. DOI： 10.7638/kqdlxxb-2020.0145

NIU Xiaofei, WANG Xunnian, LI Yong. Numerical and experimental study on rotor-stator interaction noise of an axial fan[J]. 2021, 39(5): 44-52. DOI： 10.7638/kqdlxxb-2020.0145.

摘要

动/静干涉噪声是风扇单音噪声的重要组成部分

本文采用数值模拟与实验相结合的方式对某轴流冷却风扇转子与下游支柱之间干涉噪声的抑制进行了研究。数值计算采用大涡模拟（LES）与FW-H方程相结合的混合方法，噪声实验在全消声室中利用远场麦克风测量。通过改变支柱迎风面宽度（

）和壁面开槽（对应不同穿孔率

）两种方式来改变风扇模型的流动工况，分析不同控制策略对风扇气流流动和远场噪声特性的影响。结果表明，在下游支柱的干扰作用下，轴流风扇压力面的平均静压在叶片中部呈现周期性的分布。随着支柱迎风面宽度

的减小和壁面槽穿孔率

的增大，支柱上的平均静压和风扇压力面的RMS压力逐渐降低。两种控制策略均能够有效减弱涡及其涡/固干扰强度，从而降低风扇噪声。数值模拟与实验结果吻合较好，显示风扇叶片通过频率BPF处的最大降噪量在所研究的流动配置下可以达到5 dB以上。

Abstract

Rotor - stator interaction noise is a crucial component of fan noise. The interaction noise between the rotor of axial cooling fan and the downstream strut is studied by means of numerical simulation and experiment. In numerical simulation

the interior complex flow characteristics of the fan are captured by Large Eddy Simulation model

and the characteristics of far-field noise are modeled by ulilizing FW-H equation based on the acoustic analogy theory. The experiment was carried out in an anechoic chamber by using free-field microphones. The flow of the fan is changed by means of changing the windward widt

of the downstream strut and making a slot

and the effect of different control strategies on the aerodynamic and noise characteristics of the fan is analyzed. The results show that: Subjected to the interaction of the downstream strut to the fan

the mean static pressure of pressure surface for the fan presents a periodic distribution in the middle of the blade. The decrease of the width

and the increase of the perforation rate

of the strut can effectively reduce the mean static pressure of the strut and the RMS pressure. The interaction noise is related to the leakage vortex between the rotating outer ring of the fan and the downstream strut. The two different control strategies can suppress the generation of vortex and reduce the discrete noise. Good agreement is obtained between the simulation and the experiment

and both results show that the maximum noise reduction of more than 5 dB can be achieved at the Blade Passing Frequency (BPF) under the cases that we have tested.

关键词

Keywords

references

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