Aerodynamics and Aeroacoustics of Micro Air Vehicles

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

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 1673

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Temasek Laboratories, National University of Singapore, Singapore 117411, Singapore
Interests: flapping wing micro air vehicles; bio-inspired robots; flapping wing aerodynamics
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Dear Colleagues,

Micro Air Vehicles (MAVs) have been constantly studied during the last decade. Many of them are now ready and being used for practical applications for both civil service and military surveillance. However, there have recently been challenges in aerodynamic efficiency; both the low Reynolds number and aeroacoustic noise caught our attention when they came into practical application. Therefore, addressing and understanding aerodynamics at a low Reynolds number for aerodynamics enhancement and reducing the perceived noise of micro air vehicles without compromising their aerodynamic efficiency would be crucial in practical missions. This Special Issue of Fluids, entitled “Aerodynamics and Aeroacoustics of Micro Air Vehicles”, aims to collect articles related to aerodynamics and aeroacoustics of micro air vehicles in order to introduce them to readers in relevant research areas. Topics of the Special Issue include but are not limited to, the aerodynamics of MAVs including flapping flight, wing and propeller design for low acoustic signature MAVs, Computational Fluid Dynamic (CFD) simulation, the experiment of aerodynamics and aeroacoustics for MAVs including fixed wings, rotary wings, and flapping wings.

Dr. Quoc Nguyen
Guest Editor

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Keywords

  • bird flight
  • insect flight
  • bat flight
  • micro air vehicles
  • flapping wing
  • unsteady aerodynamics
  • aeroacoustics
  • CFD simulation

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Published Papers (1 paper)

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Research

31 pages, 16083 KiB  
Article
Analysis of MAV Rotors Optimized for Low Noise and Aerodynamic Efficiency with Operational Constraints
by Pietro Li Volsi, Gianluigi Brogna, Romain Gojon, Thierry Jardin, Hélène Parisot-Dupuis and Jean-Marc Moschetta
Fluids 2024, 9(4), 96; https://doi.org/10.3390/fluids9040096 - 19 Apr 2024
Cited by 1 | Viewed by 1276
Abstract
The rapid growth of drone use in urban areas has prompted authorities to review airspace regulations, forcing drone manufacturers to anticipate and reduce the noise emissions during the design stage. Additionally, micro air vehicles (MAVs) are designed to be aerodynamically efficient, allowing them [...] Read more.
The rapid growth of drone use in urban areas has prompted authorities to review airspace regulations, forcing drone manufacturers to anticipate and reduce the noise emissions during the design stage. Additionally, micro air vehicles (MAVs) are designed to be aerodynamically efficient, allowing them to fly farther, longer and safer. In this study, a steady aerodynamic code and an acoustic propagator based on the non-linear vortex lattice method (NVLM) and Farassat’s formulation-1A of the Ffowcs Williams and Hawkings (FW-H) acoustic analogy, respectively, are coupled with pymoo, a python-based optimization framework. This tool is used to perform a multi-objective (noise and aerodynamic efficiency) optimization of a 20 cm diameter two-bladed rotor under hovering conditions. From the set of optimized results, (i.e., the Pareto front), three different rotors are 3D-printed using a stereolithography (SLA) technique and tested in an anechoic room. Here, an array of far-field microphones captures the acoustic radiation and directivity of the rotor, while a balance measures the aerodynamic performance. Both the aerodynamic and aeroacoustic performance of the three different rotors, in line with what has been predicted by the numerical codes, are compared and guidelines for the design of aerodynamically and aeroacoustically efficient MAV rotors are extracted. Full article
(This article belongs to the Special Issue Aerodynamics and Aeroacoustics of Micro Air Vehicles)
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