A numerical investigation of the aerodynamic and aeroacoustic interactions between components of a multi-rotor vehicle for urban air mobility

Y Li, Z Ma, P Zhou, S Zhong, X Zhang - Journal of Sound and Vibration, 2024 - Elsevier
In this work, we conduct a numerical investigation of a hexacopter for urban air mobility,
emphasizing the interactional effect between different components of the vehicle on the …

Experimental and numerical investigations on rotor noise in axial descending flight

Y Li, X Li, H Wu, P Zhou, X Zhang, S Zhong - Physical Review Fluids, 2023 - APS
While various aerodynamic noise generation mechanisms and characteristics have been
extensively studied for drone research, the noise features during the descending flight state …

[HTML][HTML] Experimental characterisation of rotor noise in tandem configuration

A Celik, NS Jamaluddin, K Baskaran, S Meloni… - Applied Acoustics, 2024 - Elsevier
This paper presents a comprehensive investigation into the noise radiation characteristics of
two rotors in a tandem configuration. Through an extensive experimental campaign, the …

Effects of the secondary air on the combustion characteristics of turbulent premixed CH4/NH3/air

J Kim, H Lee, JM Lee, J Park, SH Chung… - Proceedings of the …, 2024 - Elsevier
This study experimentally investigates the effects of secondary air injection on the flame
structure and CO/NO emission characteristics of turbulent premixed CH 4/NH 3/air flames in …

[HTML][HTML] The vortex ring state of a rotor and its comparison with the collapse of an annular jet in counterflow

DJ Pickles, RB Green, A Busse - Physics of Fluids, 2023 - pubs.aip.org
The vortex ring state (VRS) of a rotor is associated with the development of the trailed vortex
system in powered descending flight, where the topology of the vortex wake changes from …

Mechanism analysis of the influence of rotor-to-rotor interactions on global rotor noise

X Xu, Y Lu, C Lan, M Shao, J Lu - Journal of Sound and Vibration, 2024 - Elsevier
Existing research mainly investigated the influence of rotor-to-rotor interactions on the
aerodynamics performance and noise level, but did not reveal the mechanism by which …

Effects of rotor–rotor interaction for a small tandem rotor operating in a crosswind

S Chae, S Lee, S Hwang, S Jeong, J Kim - Physics of Fluids, 2024 - pubs.aip.org
This study investigates the effects of rotor–rotor interaction on the wake and thrust
characteristics of a small tandem rotor operating in a crosswind. Flow velocity and force …

Interactional aerodynamics and acoustics of a rotor with an airframe in hover

SJ Kim, YH Hwang, RS Myong, H Lee - Physics of Fluids, 2024 - pubs.aip.org
The demand for the development of urban air mobility (UAM) powered by electric systems
has been steadily rising across private and public sectors. Most UAM flights incorporate a …

Computations of Multicopter Aerodynamics in Vertical Flight with Overset Grids in OpenFOAM

YM Park, SK Jee - AIAA Aviation 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-3667. vid Multicopter
aerodynamics in vertical flight is computationally investigated, specifically focusing on …

Influence of fuselage arm cross-section on the aerodynamic and aeroacoustic performance of quadcopter unmanned aerial vehicles: A numerical investigation

L Jizhou, L Ming, Y Kaimin… - International Journal of …, 2023 - journals.sagepub.com
This paper investigates the influence of the fuselage arm cross-section shape on the
aerodynamic and aeroacoustic performance of quadcopter Unmanned Aerial Vehicles in …