Abstract

A three-dimensional Acoustic Intensity-Based Method (AIBM) for the reconstruction and prediction of radiated fields is developed. The method is verified by examples of the propagation of multiple acoustic sources in an uniform flow and the acoustic scattering of a time dependent source by a sphere. The effectiveness of AIBM in aeroacoustic applications is demonstrated by the accuracy and efficiency of the predicted acousticradiations from an axisymmetric duct intake by a hybrid CAA/AIBM approach. The results of the radiated acoustic field from AIBM agree well with the solutions of computational aeroacoustics (CAA) and the FW-H integral equation. The AIBM is much more efficient than the other methods for the far field acoustic prediction and can use the input acoustic data from an open surface instead of a closed FW-H surface.

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