Noise Reduction on Centrifugal Fan via the Quarter-Wave Resonator

Abstract:

The purpose of this work is to improve flow-induced noise for the centrifugal fan with quarter-wave resonator by design scheme, mockup fabrication, and experimental test. At first, the cascade theory is utilized to generate the three-dimensional fan configuration which is fabricated for performance and acoustic tests later. Next, FFT is applied to measure the noise for comparison and evaluating the effect of quarter-wave resonator. To reduce the fan noise, a set of quarter-wave resonator of this centrifugal fan are designed and fabricated on the centrifugal fan. Consequently, the flow-induced-noise reduction due to the aerodynamics is examined and discussed in details. In conclusions, a comprehensive parametric study on quarter-wave resonator is carried out and summarized for attaining a design guideline for its application on centrifugal fan. The accomplishment of this study provides a systematic scheme of noise reduction for a centrifugal fan with the addition of quarter-wave resonator design.

• Periodical: Applied Mechanics and Materials (Volumes 764-765)
• Pages: 319-323
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.764-765.319
• Online since: May 2015
• Authors: Sheam Chyun Lin*, Yu Chuan Wu, Hung Cheng Yen, Wen Syang Hsu, Yung Jen Cheng
• Keywords: Centrifugal Fan, Flow-Induced Noise, Mockup Fabrication, Quarter-Wave Resonator

References

[1] Neise, W. & Koopman, G. H.: Reduction of Centrifugal Fan Noise by Use of Resonator. Journal of Sound and Viberation , Vol. 72 (1980), pp.297-308.

[2] Neise, W. & Koopman, G. H.: The Use of Resonators to Silence Centrifugal Blowers, Journal of Sound and Vibration Vol. 72 No. 1 (1982), pp.17-27.

DOI: 10.1016/0022-460x(82)90539-9

[3] Lotz & Robert, Inter-Noise. Proceedings of the Internation Conference of Noise Control Engineering Vol. 1 (1986), pp.199-204.

[4] Field, C. D. & Fricke, F. R., Theory and Application of Quarter-wave Resonators: A Prelude to Their Use for Attenuation Noise Entering Buildings through Ventilation Openings. Applied Acoustics Vol. 53 No. 1-3 (1998), pp.117-132.

DOI: 10.1016/s0003-682x(97)00035-2

[5] CNS 8753 Determination of Sound Power Level of Noises for Fan, Blower, and Compressors. (1982).

[6] CNS 8754 Determination of Sound Power Level of Noises for Fan, Blower, and Compressors. Chinese National Standard. (1982).