Prediction of sound exposure caused by a landing motor glider with recuperating propellers

  • This paper presents an approach to predicting the sound exposure on the ground caused by a landing aircraft with recuperating propellers. The noise source along the trajectory of a flight specified for a steeper approach is simulated based on measurements of sound power levels and additional parameters of a single propeller placed in a wind tunnel. To validate the measured data/measurement results, these simulations are also supported by overflight measurements of a test aircraft. It is shown that the simple source models of propellers do not provide fully satisfactory results since the sound levels are estimated too low. Nevertheless, with a further reference comparison, margins for an acceptable increase in the sound power level of the aircraft on its now steeper approach path could be estimated. Thus, in this case, a +7 dB increase in SWL would not increase the SEL compared to the conventional approach within only 2 km ahead of the airfield.

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Author:Sebastian Hille, Eike Stumpf, Joscha MayntzORCiD, Peter Dahmann
Parent Title (English):AIAA SCITECH 2023 Forum
Document Type:Conference Proceeding
Year of Completion:2023
Date of the Publication (Server):2023/03/07
AIAA SCITECH 2023 Forum, 23-27 January 2023, National Harbor, MD & Online
Institutes:FH Aachen / Fachbereich Luft- und Raumfahrttechnik
collections:Verlag / AIAA