비균일 입류에 의한 팬소음 해석Analysis of Non-Uniform Inflow Fan Noise

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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 fan noise of fan system having unsymmetric engine-room is predicted. In this paper, the discussion is confined to the performance and discrete noise of axial fan and front part of engine room in heavy equipments.
Publisher
한국소음진동공학회
Issue Date
2000-11-16
Language
KOR
Citation

한국소음진동공학회 2000년도 추계학술대회, pp.106 - 112

URI
http://hdl.handle.net/10203/137193
Appears in Collection
AE-Conference Papers(학술회의논문)
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