Characterization of the flow through innovative permeable fairings at the VKI WAABLIEF facility

Aircraft-noise mitigation is a significant issue in the aviation industry due to the operation and expansion of airports and the growth of residential areas surrounding them. Take-off and landing are considered critical phases of a flight path regarding the noise impact. During a typical approach, the airframe noise has become a dominant noise source as the engine noise has been reduced after intensive studies performed for decades. Landing gears (LGs) are among the main contributors to the generation of this noise source, and one of the promising noise-reduction technologies (NRTs) that have been proposed consists of placing flow-permeable fairings in front of them. However, the development of these NRTs is limited due to the strong integration constraints imposed by the other disciplines and the lack of knowledge of the complex flow physics involved in the problem. The project INVENTOR, funded by the European Union in the framework of the H2020 MG-1-5-2019 call ”Advancements in aerodynamics and innovative propulsion systems for quieter and greener aircrafts” (Grant Agreement number: 860538), aims to fill this scientific gap and understand the noise generated by LGs integrated with porous fairings through numerical methods. Nevertheless, these flow-permeable materials must be modeled and validated through measurements to obtain high-accuracy numerical predictions. Therefore, the objective of the present submission is to provide an extensive experimental dataset of the characterization of the flow through fairings fitted with innovative porous materials. The measurement campaign has been carried out at the WAABLIEF facility of the von Karman Institute for Fluid Dynamics (VKI) and contains particle-image-velocimetry, hot-wire-anemometry, and total-pressure measurements at different flow speeds and with several materials. The document attached to the dataset includes all the information required to numerically reproduce the VKI experimental setup.