15th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-15
ISROMAC edition:15 location:Hawai
The Amiet theory has been proven as an instrumental tool for the fast and accurate noise prediction of rotating machinery. The present paper presents an innovative methodology which extends the Amiet’s theory allowing considering angle of attack and blade geometry effects on the far-field noise prediction. In addition this methodology overcomes the Amiet’s infinite span airfoil requirement addressing blade tip effects and non-uniform inflow.
This paper concerns the aerodynamically generated noise of rotating blades focusing on the airfoil leading edge noise generation mechanisms. On rotating blades, the leading edge noise is generally associated periodic flow features or turbulence airfoil interaction. The first is responsible for the tones on the acoustic spectrum, while the second for the broadband component and the spectral predominance of either these two mechanisms is generally a function of the blade passing frequency.