最小化第一叶片通过频率噪声的风机最佳风管长度

IF 0.3 4区工程技术 Q4 ACOUSTICS

Noise Control Engineering Journal Pub Date : 2023-05-01 DOI:10.3397/1/377116

Min-Hyeok Kim, Suk-Yoon Hong, Jee-hun Song, Beom-Jin Joe, Woen-Sug Choi

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引用次数: 0

摘要

风扇产生音调噪声和宽带噪声。第一叶片通过频率噪声是音调噪声，是最主要的;安装管道和定子可以减少这种噪音。然而，在利用结构特性来降低风管风机噪声方面尚无理论进展。在本研究中，使用Lighthill方程和Green函数进行噪声预测，以确定管道风扇降噪的最佳管道长度。利用模态噪声分析导出了预测长度的新公式。噪声源来源于计算流体力学数据和壁面压力谱。该公式推导出管道半径和长度之间的线性关系，可以作为在空间和重量限制下设计阶段指示风扇尺寸的工具，而无需高计算成本。

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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Optimal duct length of ducted fans for minimizing first blade-passing frequency noise

Fans generate tone noise and broadband noise. The first blade-passing frequency noise is a tone noise and is the most dominant; attaching a duct and a stator can reduce this noise. However, there has been no theoretical development in using structural characteristics to reduce the noise generated by ducted fans. In this study, noise predictions using Lighthill's equation and Green's function were performed to determine the optimal duct length for a ducted fan's noise reduction. New formulations for predicting the length were derived using a modal noise analysis. Noise sources were obtained from computational fluid dynamics data and wall pressure spectra. The formulations deduce a linear relationship between a duct's radius and length and can be used as a tool to indicate fan size at the design stage under space and weight constraints without high computational costs.

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来源期刊

Noise Control Engineering Journal 工程技术-工程：综合

CiteScore

0.90

自引率

25.00%

发文量

审稿时长

3 months

期刊介绍： NCEJ is the pre-eminent academic journal of noise control. It is the International Journal of the Institute of Noise Control Engineering of the USA. It is also produced with the participation and assistance of the Korean Society of Noise and Vibration Engineering (KSNVE). NCEJ reaches noise control professionals around the world, covering over 50 national noise control societies and institutes. INCE encourages you to submit your next paper to NCEJ. Choosing NCEJ: Provides the opportunity to reach a global audience of NCE professionals, academics, and students; Enhances the prestige of your work; Validates your work by formal peer review.