Print Email Facebook Twitter Breakdown of propeller aircraft noise by applying conventional beamforming jointly with imaging using the rotating source identifier Title Breakdown of propeller aircraft noise by applying conventional beamforming jointly with imaging using the rotating source identifier Author von den Hoff, B. (TU Delft Aircraft Noise and Climate Effects) Simons, D.G. (TU Delft Aircraft Noise and Climate Effects) Snellen, M. (TU Delft Control & Operations) Contributor Döbler, D (editor) Department Control & Operations Date 2022 Abstract Full-scale propeller measurements are useful to study the total noise contribution of a propeller-driven aircraft, including installation effects. Full-scale measurements under operational conditions also provide an accurate validation opportunity for propeller noise prediction models. These studies are, therefore, necessary to quantify and reduce the noise annoyance of propeller-driven aircraft. For propeller aircraft, rotating sources need to be considered. In this research, propeller noise is studied for a full-scale propeller using an acoustic microphone array. The acoustic imaging techniques used are Conventional Frequency-Domain or Time-Domain Beamforming for the stationary noise sources and the ROtating Source Identifier for the rotating noise sources. By applying these two acoustic imaging methods simultaneously, in addition to filtering in the spatial and frequency domain, also filtering in the source velocity domain can be exploited. These methods were applied to an engine run-up of a Pipistrel Velis Electro, the first fully-electric certified aircraft.This electric aircraft, placed on the ground, allows for an initial study on the present noise sources and their relative contributions. Ultimately, this information can be used to separate the measured spectrum into spectra of different noise components which in turn can be used for full-scale validation and improvement of propeller noise prediction models. Subject Propeller nioseMicrophone arrayAcoustic imaging To reference this document use: http://resolver.tudelft.nl/uuid:922a5514-83bf-472e-8948-dcb84a97a31f Source 9th Berlin Beamforming Conference 2022 Event 9th Berlin Beamforming Conference, 2022-06-09 → 2022-06-10, Berlin, Germany Part of collection Institutional Repository Document type conference paper Rights © 2022 B. von den Hoff, D.G. Simons, M. Snellen Files PDF BeBeC_2022_D02.pdf 4.13 MB Close viewer /islandora/object/uuid:922a5514-83bf-472e-8948-dcb84a97a31f/datastream/OBJ/view