The aim of this review paper is to collect and discuss the most relevant and updated
contributions in the literature regarding studies on new or non-conventional technologies for …

Airports are significant energy consumers within the air transport sector, with energy usage
levels comparable to those of small cities. Due to their rapid economic growth and high …

This paper deals with the innovative development of surrogate models suitable for the
simulation of aerodynamic performance and acoustic emission in terms of tonal …

Abstract A hybrid Large Eddy Simulation (LES)/Actuator Line Model (ALM) computational
approach is employed to simulate the turbulent wake of a two-bladed rotor in hover …

This paper presents the performance analysis and a parametric study of equivalent
ducted/un-ducted rotors using high-fidelity CFD methods. A model-scale ducted rotor case …

This study focuses on the integration of established acoustic prediction techniques directly
into a surface-vorticity solver. The main objective is to enhance an aircraft designer's ability …

Because of their potential to reduce aircraft emissions, counter-rotating open rotors (CRORs)
have seen a renewed interest in applications, from civil aviation to urban air mobility …

We review the development of the contra-rotating propellers from the origins to the present.
Initially, these systems were proposed to increase speed, then to increase propulsive …

The reduction of sound pressure level (SPL) induced by the fluid flow is one of the central
factors in the modern aerodynamic designs. In the present study, the aerodynamic …

Counter-rotating rotor configurations are considered more efficient than their single rotor
counterparts. Consequently, the coaxially aligned rotors have appeared in the fixed-wing …