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Cited 8 time in webofscience Cited 10 time in scopus
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Experimental and computational investigation of the effect of blade sweep on acoustic characteristics of axial fan

Authors
Park, MinjunLee, Duck-JooLee, Hakjin
Issue Date
28-Feb-2022
Publisher
Pergamon Press Ltd.
Keywords
Axial fan; Sweep effect; Noise measurement; Computational Fluid Dynamics (CFD); Acoustic analogy
Citation
Applied Acoustics, v.189
Indexed
SCIE
SCOPUS
Journal Title
Applied Acoustics
Volume
189
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/1597
DOI
10.1016/j.apacoust.2021.108613
ISSN
0003-682X
1872-910X
Abstract
The swept blade is one of the most efficient and practical techniques to alleviate the noise radiated from rotating fans. In this study, the swept effects of an automotive cooling fan on its acoustic characteristics were investigated using numerical and experimental approaches. Straight, forward, and backward-swept blades with a serrated shroud configuration were fabricated for the automotive cooling systems, and their performance and noise levels were measured. Moreover, measurements on the acoustic spectra were used to validate the numerical predictions. The pressure fluctuation on the cooling fan system, including the fan and shroud, was calculated from unsteady computational fluid dynamics simulation, and the acoustic signal at observer positions was predicted using an acoustic analogy. The swept effects in terms of noise reduction were compared for all three swept blades. Results indicate that the sweep angle in the forward direction can reduce the noise level of the cooling fan with a serrated shroud. Hence, the characteristics of the noise source caused by swept blades surrounding the shroud were identified in automotive cooling fans. Our findings in the present study provided significant insight into the acoustic characteristics depending on the direction of the swept blade, they can be used as a guide for designing a low-noise fan blade. (c) 2021 Elsevier Ltd. All rights reserved.
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Lee, Hak Jin
대학원 (기계항공우주공학부)
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