축류팬에서의 광대역소음 발생에 대한 실험적 연구

다국어 초록 (Multilingual Abstract)

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.

목차 (Table of Contents)

• ABSTRACT
  
• 1. 서론
  
• 2. 축류팬 광대역소음의 발생기구와 예측법
  
• 3. 실험장치의 구성 및 실험 모형
  
• 4. 실험결과 및 예측결과와의 비교
  
• 5. 결론
  
• 후기
  
• 참고문헌