중장비 축류홴 저소음화 기법Low Noise Techique of Axial Fan in Heavy Equipments

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Axial fans are widely used in heavy machines due to their ability to produce high flow rate for cooling of engines. At the same time, the noise generated by these fans causes one of the most serious problems. This work is concerned with the low noise technique of discrete frequency noise. The prediction model, which allowed the calculation of acoustic pressure at the blade passing frequency and it's harmonics, has been developed by Farrasat. This theory is founded upon the acoustic radiation of unsteady forces acting on blade. To calculate the unsteady resultant force over the fan blade. Time-Marching Free-Wake Method are used. The ideas of low noise technique are obtained from Blade-Momentum Methods. In this paper, the discussion is confined to the performance and discrete noise of axial fan in heavy equipments.
Publisher
한국소음진동공학회
Issue Date
2000-06-01
Language
KOR
Citation

한국소음진동공학회 학술대회

URI
http://hdl.handle.net/10203/137103
Appears in Collection
AE-Conference Papers(학술회의논문)
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