유체기계공업학회:학술대회논문집
- 유체기계공업학회 1998년도 유체기계 연구개발 발표회 논문집
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- Pages.91-96
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- 1998
축류팬에서의 광대역소음 발생에 대한 실험적 연구
An Experimental study on the Broadband Noise Generation in Axial Flow Fan
초록
The broadband noise generated aerodynamically from a two-bladed axial flow fan has been measured and compared to the result of a self-noise prediction method. The prediction scheme is based on the experimental data set acquired from a series of aerodynamic and acoustic tests of two and three-dimensional airfoil blade sections. For low blade loading case the comparison showed a reasonably good agreement, but as the loading becomes larger the empirical formula overpredict the sound pressure level at high frequency range. This is probably due to the use of stationary wing data for the prediction of rotating blade case, which will be quite different in their vortex strength at the blade tip.