The aeroacoustic response of the orthogonal interaction of a rotating blade with an isolated Batchelor vortex is studied by means of numerical simulation. The influence of the vortex tangential and axial velocity on the blade aerodynamics and on the acoustics radiated in the far field are investigated separately and compared to the results obtained considering the interaction of the blade with a vortex with both velocity components. Analyses show that the vortex tangential velocity is responsible for the noise level at low frequencies and that the vortex axial velocity is responsible for the noise level at high frequencies. For the range of frequencies in between, the interaction noise results from constructive interferences of the noise radiated separately by each velocity component of the vortex.
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