National Changhua University of Education Institutional Repository : Item 987654321/18325

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NCUEIR > College of Technology > vr > Periodical Articles > Item 987654321/18325

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/18325

Title:	A Ring Silencer Design for Reducing Noise of Axial Fan
Authors:	Wu, Jian-Da;Bai, Mingsian R.
Contributors:	車輛科技研究所
Keywords:	Ring silencer;Axial fan;Fan noise;Helmholtz resonator;Electro acoustic
Date:	2003
Issue Date:	2014-04-29T07:26:13Z
Publisher:	World Scientific Publishing Company
Abstract:	In this paper, a ring silencer design for reducing the noise of axial fans is presented. The noise sources on axial fans are usually caused by the fluctuating pressure distribution on the surface of fan blade. Most of the sources are near the trailing edge of blades or boundary region of blades. The ideation of proposed design is based on the principle of Helmholtz resonator for reducing the noise around the fan. The electro-acoustic analogy of this design is presented and simply discussed. Experimental measurement is carried out to evaluate the proposed design for reducing the axial fan noise. The result of experiment indicated that the ring silencer achieved 17 dB in blade passing frequency and 10 dB in other broadband frequency of power spectrum level.
Relation:	Fluctuation and Noise Letters, 3(3): 259-264
Appears in Collections:	[vr] Periodical Articles

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