What is it about?
Acoustic measurements in the aero-engine intra-stage are suitable for estimating the relative contribution of the rotor (fan) and the OGV (outlet guide vanes) broadband (BB) noise sources. In this paper, I discuss the design of efficient microphone arrays as well as the development of suitable phased array techniques to accomplish the source separation of the fan BB noise in the engine intra-stage.
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Why is it important?
In this paper, I present a generalized framework that would enable one to develop appropriate phased array techniques for any given intra-stage microphone array geometry. As an illustration, this paper uses the proposed framework to develop numerous phased array techniques out of the microphone array geometry of a model turbofan engine and successfully demonstrates their measurement capabilities. The work presented in this paper would guide fan noise engineers to design effective intra-stage microphone arrays for source separation of the fan broadband noise.
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This page is a summary of: Generalized microphone array geometries for source separation in engine intra-stages, June 2023, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2023-3816.
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