Aeroacoustics research in Europe: The CEAS-ASC report on 2024 highlights, Contribution: Retrofit measures for aircraft noise reduction - Simulation benchmark and impact assessment

Abstract

Retrofit measures to mitigate aircraft noise for conventional mid-range transportation aircraft have been under investigation at the German Aerospace Center (DLR) for many years. In 2016, the Advanced Technology Research Aircraft (ATRA) DLR testbed was subject to a dedicated flight campaign to evaluate the noise for the original vehicle without additional measures. Selected measures from previous research activities over the last years, i.e., with the main focus on airframe noise reduction, have then been installed on board and evaluated in a follow-on campaign under similar test conditions and settings in 2019. Based on recorded flight data and noise levels during both flight campaigns, a detailed evaluation was enabled for the first time to quantify the impact of these retrofit measures if operated on board of a real aircraft.