This experimental study investigates the effect of blade phase angle on noise attenuation in
two adjacent, electronically synchronized propellers. Acoustic measurements were …

This paper presents an experimental study on characterising the aerodynamic and far-field
acoustic performance of rotors operating in non-axial inflow conditions. The current …

The understanding and reduction of noise from the new generation of electric propeller-
driven aircraft, such as those adopted in Electric Distributed Propulsion (DEP) …

Experiments were carried out to examine the aerodynamic and aeroacoustic characteristics
of overlapped multi-propeller configurations under various inflow turbulence conditions. The …

The configuration of rotors significantly impacts the aerodynamic efficiency and noise
emission of multicopters. To date, there are no general guidelines regarding how many …

A comprehensive aeroacoustics study was conducted on distributed electric propulsion
(DEP) systems, focusing on small-scale, novel aircraft within the Urban Air Mobility (UAM) …

The research of sustainable energy sources is thriving as significant efforts are being made
to reduce energy costs through innovations. In the case of closed conduit axial flow turbine …

Some natural wind-borne plants spread their seeds in a mode of autorotation, for example,
maple, pterocarya stenoptera, and tristellateia. However, these wind-borne seeds have …

This study presents a predominantly numerical and theoretical investigation into the balance
of tonal and broadband noise due to an isolated propeller in uniform motion. The predicted …

To improve the efficiency and stealthiness of marine operations of autonomous underwater
vehicles (AUVs), 12 loop propellers with different structural parameters are selected as …