Aeroacoustics of Drones

A special issue of Fluids (ISSN 2311-5521).

Deadline for manuscript submissions: closed (15 December 2022) | Viewed by 6619

Special Issue Editor


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Guest Editor
Engineering Faculty, Niccolò Cusano University, via don Carlo Gnocchi 3, 00166 Rome, Italy
Interests: aeroacoustics

Special Issue Information

Dear Colleagues,

The European Union has a defined service-orientated architecture for air traffic management of drones in urban areas, called U-space. One of the main obstacles to the massive use of drones in our cities is the generated noise and its impact on health. For these reasons, the topic of noise generated by drones has become dominant in the aeroacoustics scientific community, which is responding with colossal efforts.

This Special Issue will present the state of the art of the aeroacoustics of small-scale rotors and propellers for drone propulsion. Manuscripts are invited covering the full range of noise simulation, from low- to high-fidelity methods, experimental techniques, novel strategies for data post-processing, and methods for noise mitigation. In particular, manuscripts concerning noise and noise sources associated with single propellers, propellers in twin and contra-rotating configuration, wing–propeller or fuselage–propeller interaction, and complete drones are welcome.

Dr. Tiziano Pagliaroli
Guest Editor

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Keywords

  • aeroacoustics
  • rotor
  • propellers
  • drones
  • noise

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Published Papers (1 paper)

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Review

23 pages, 750 KiB  
Review
Small-Scale Rotor Aeroacoustics for Drone Propulsion: A Review of Noise Sources and Control Strategies
by Paolo Candeloro, Daniele Ragni and Tiziano Pagliaroli
Fluids 2022, 7(8), 279; https://doi.org/10.3390/fluids7080279 - 15 Aug 2022
Cited by 15 | Viewed by 5815
Abstract
In the last decade, the drone market has grown rapidly for both civil and military purposes. Due to their versatility, the demand for drones is constantly increasing, with several industrial players joining the venture to transfer urban mobility to the air. This has [...] Read more.
In the last decade, the drone market has grown rapidly for both civil and military purposes. Due to their versatility, the demand for drones is constantly increasing, with several industrial players joining the venture to transfer urban mobility to the air. This has exacerbated the problem of noise pollution, mainly due to the relatively lower altitude of these vehicles and the proximity of their routes to extremely densely populated areas. In particular, both the aerodynamic and aeroacoustic optimization of the propulsive system and of its interaction with the airframe are key aspects of unmanned aerial vehicle design that can signify the success or the failure of their mission. The industrial challenge involves finding the best performance in terms of loading, efficiency and weight, and, at the same time, the most silent configuration. For these reasons, research has focused on an initial localization of the noise sources and, on further analysis, of the noise generation mechanism, focusing particularly on directivity and scattering. The aim of the present study is to review the noise source mechanisms and the state-of-the-art control strategies, available in the literature, for its suppression, focusing especially on the fluid-dynamic aspects of low Reynolds numbers of the propulsive system and on the interaction of the propulsive system flow with the airframe. Full article
(This article belongs to the Special Issue Aeroacoustics of Drones)
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