Analysis of the aeroacoustic characteristics of the centrifugal fan in a vacuum cleaner

Jeon, Wan-Ho; Baek, Seung-Jo; Kim, Chang-Joon

doi:10.1016/s0022-460x(03)00319-5

Cited by 36 publications

(20 citation statements)

References 5 publications

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“…Whereas in the SPL spectrum of the presented fan measured at the BEP, the tonal noise at the second BPF is the highest peak, even the fourth BPF is a relatively high peak. This agrees with the result given by Jeon et al [1]. Figure 4(c) also shows that the broadband noise increases at off-design flowrate.…”

Section: Resultssupporting

confidence: 91%

“…Therefore, the vacuum fan produces highlevel noise over 80 dB(A), which is harmful to human health. Several studies [1][2][3][4][5] have been conducted about the noise of the centrifugal fan in a vacuum cleaner. For instance, Jeon et al [1] numerically analysed the unsteady flow field of the centrifugal fan and developed a method to predict the fan noise.…”

Section: Introductionmentioning

confidence: 99%

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The influence of the geometry of the leading edge of diffuser vanes on the noise generated by a centrifugal fan

Zhang

Gong

2010

Proceedings of the Institution of Mechanical Engineers, Part A:

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An experimental study is described to investigate the influence of diffuser vane leading edge on the noise behaviour of a centrifugal fan. The geometric shapes of the diffuser vane leading edge refer to the diffuser inlet radius, and the broken and inclined leading edges. The sound pressure level and pressure rise of the centrifugal fan were measured in a semianechoic chamber. The rotational speed of the test fan varied from 20 000 to 35 000 r/min; the flow coefficient was in the range of 0.02-0.14. The results show that: (a) by using the inclined leading edge vaned diffuser (ILEVD) with proper inclined angle, the overall fan noise is reduced by 3.6 dB(A), and the fan performance is improved; (b) when the diffuser leading edge radius R 3 /R 2 increases from 1.03 to 1.07, the tones are reduced whereas the broadband noise is almost unchanged; and (c) the influence of the broken leading edge diffuser on the overall fan noise and performance is negligible, although the tonal noise is reduced by 4 dB(A). In order to better understand the behaviour of the ILEVDs, a numerical simulation has been carried out on steady three-dimensional flows. The results indicate that the flow condition improves by the application of the ILEVD.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

The influence of the geometry of the leading edge of diffuser vanes on the noise generated by a centrifugal fan

Zhang

Gong

2010

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Jeon et al (2003Jeon et al ( , 2004 identified the acoustic characteristics of a centrifugal fan and suggested an impeller design to reduce the tonal noise. They showed experimentally that the overall noise level and the strong tonal noise produced from a vacuum cleaner are reduced by a tapered impeller design.…”

Section: Introductionmentioning

confidence: 99%

Reduction of aero-acoustic noise originating from a high-speed polygon mirror scanner motor in a laser beam printer utilizing air-flow analysis

et al. 2011

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This research investigates the aero-acoustic noise originating from a high-speed polygon mirror of a laser beam printer by identifying its source and propagation numerically and experimentally. It calculates the air flow around the polygon mirror scanner motor of a laser printer operating at high speed. Simulated velocity of air flow around the polygon mirror is compared with the experimental velocity measured using a hot-wire anemometer. The frequency spectrum of the air flow around the polygon mirror matches that of the aero-acoustic noise. A significant number of discrete peaks and a broadband of aeroacoustic noise originate from the turbulent air flow around the polygon mirror. We propose the use of a cylindrical block to reduce turbulent air flow around the polygon mirror. The proposed design reduces not only the turbulent air flow but also the discrete peaks and the broadband of aero-acoustic noise.

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“…The noise generated from the vacuum fan mainly consists of aeroacoustic noise, mechanical noise, and electromagnetic noise, among which the aeroacoustic noise is the main component. Several studies 1–5 have been conducted about the aeroacoustic noise of the centrifugal fan in a vacuum cleaner. Jeon et al 1 numerically analyzed the unsteady flow field of the centrifugal fan and developed a method to predict the fan noise.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies 1–5 have been conducted about the aeroacoustic noise of the centrifugal fan in a vacuum cleaner. Jeon et al 1 numerically analyzed the unsteady flow field of the centrifugal fan and developed a method to predict the fan noise. Cudina and Prezelj 2–4 experimentally studied the aerodynamic, mechanical, and electromagnetic noise emitted by a vacuum cleaner at different operating conditions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Half Vane Diffuser on the Noise Generated from a Centrifugal Fan

Zhang

Gong

Fan

et al. 2010

Experimental Techniques

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In this paper an experimental study is conducted to investigate the influence of a half vane diffuser on the noise behavior of a centrifugal fan, used in a vacuum cleaner. The diffuser vane height h/b is varied as follows: 0 (vaneless), 0.2, 0.4, 0.6, 0.8 and 1.0 (full vane) at two diffuser inlet radii R3/R2 = 1.03 and 1.07. The experiments were carried out on a high speed centrifugal fan. The sound pressure level (SPL) and pressure rise of the centrifugal fan were measured in a semi‐anechoic chamber. The fan flow coefficient was in the range of 0.02 to 0.14, and the rotational speed of the impeller varied from 20,000 to 35,000 rpm. The experimental result shows that by using a half vane diffuser, the sound pressure levels are respectively reduced by 5.5 dB(A) and 3.5 dB(A) at R3/R2 = 1.03 and 1.07. Meanwhile, the half vane diffuser improves the fan performance and extends the flow range. The optimal value of the half vane height is about 0.6 times of the diffuser width.

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Analysis of the aeroacoustic characteristics of the centrifugal fan in a vacuum cleaner

Cited by 36 publications

References 5 publications

The influence of the geometry of the leading edge of diffuser vanes on the noise generated by a centrifugal fan

The influence of the geometry of the leading edge of diffuser vanes on the noise generated by a centrifugal fan

Reduction of aero-acoustic noise originating from a high-speed polygon mirror scanner motor in a laser beam printer utilizing air-flow analysis

The Effect of Half Vane Diffuser on the Noise Generated from a Centrifugal Fan

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