05 - Propulsion
STUDY OF THE IMPACT OF AZIMUTHAL FLOW DISTORTION ON IN-DUCT ACOUSTIC PROPAGATION USING A MULTIMODAL FORMULATION
B. Mangin¹, M. Daroukh¹, G. Gabard, LAUM, France; ¹ONERA, France
The evolution of aero-engines towards UHBR architectures goes with a shortening of the nacelle length that is responsible for an important circumferential inhomogeneity of the flow. Such a distortion have a significant impact on the acoustic propagation inside the nacelle. This paper presents a fast and accurate multimodal method applicable to the computation of the acoustic field in such cases.