Noise Optimization and Experimental Verification of Voluteless Centrifugal Fan

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2023-09-05 DOI:10.1007/s40857-023-00305-9

Shuihua Zheng, Zhenghao Shao, Jianfei Liu, Yiliang Li, Yiqi Li, Yefeng Jiang, Min Chai

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Abstract

This paper focuses on the voluteless centrifugal fan and proposes a method to reduce the aerodynamic noise of the fan. Through fluid and acoustic simulations, as well as experimental investigations, the fan is examined. The innovative approach involves the implementation of an anti-vortex ring structure at the impeller front disk of the centrifugal fan, and the influence of this structure on the fan's operational efficiency and noise characteristics is analyzed. Based on this analysis, the structural parameters are optimized to control the vorticity of the impeller, resulting in improved overall performance and noise reduction of the HW355 centrifugal fan. Furthermore, noise simulations are conducted using the Lighthill analogy method, which transforms the coupling of turbulent flow and noise into an acoustic analysis of equivalent sound sources in a quiescent medium. By analyzing the results in the frequency domain, noise directivity characteristics, sound pressure level distribution on the meridional plane, and conducting noise experiments, a comprehensive analysis of the acoustic characteristics of the voluteless centrifugal fan is conducted. The study verifies the optimization effects of the innovative anti-vortex ring structure on the aerodynamic noise of the voluteless centrifugal fan.

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无蜗壳离心风机噪声优化及实验验证

本文以无蜗壳离心风机为研究对象，提出了一种降低风机气动噪声的方法。通过流体和声学模拟以及实验研究，对风扇进行了研究。该创新方法涉及在离心风机叶轮前盘上实施防涡环结构，并分析了该结构对风机运行效率和噪声特性的影响。在此基础上，对结构参数进行优化，控制叶轮涡量，提高HW355离心风机的整体性能，降低噪音。此外，采用Lighthill类比方法进行了噪声模拟，该方法将湍流和噪声的耦合转换为静态介质中等效声源的声学分析。通过频域结果分析、噪声指向性特性分析、子午面声压级分布分析以及噪声实验，对无蜗壳离心风机的声学特性进行了全面分析。研究验证了新型抗涡环结构对无蜗壳离心风机气动噪声的优化效果。

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来源期刊

Acoustics Australia ACOUSTICS-

自引率

5.90%

发文量

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.