Exergy-based formulation for aircraft aeropropulsive performance assessment: theoretical development

A Arntz, O Atinault, A Merlen - AIAA journal, 2015 - arc.aiaa.org
Aircraft have evolved into extremely complex systems that require adapted methodologies
and tools for an efficient design process. A theoretical formulation based on exergy …

Energy conservation of V-shaped swarming fixed-wing drones through position reconfiguration

A Mirzaeinia, M Hassanalian, K Lee… - Aerospace Science and …, 2019 - Elsevier
There is currently a growing interest in the area of drag reduction of unmanned aerial
vehicles. In this paper, the swarming flight of the fixed-wing drones and a load balancing …

A continuous modeling method via improved pigeon-inspired optimization for wake vortices in UAVs close formation flight

G Yuan, J Xia, H Duan - Aerospace Science and Technology, 2022 - Elsevier
This paper explores the modeling of wake vortices to estimate the wake vortex effect in
unmanned aerial vehicles (UAVs) close formation flight. A continuous horseshoe vortex …

Interactions of a streamwise-oriented vortex with a finite wing

DJ Garmann, MR Visbal - Journal of Fluid Mechanics, 2015 - cambridge.org
A canonical study is developed to investigate the unsteady interactions of a streamwise-
oriented vortex impinging upon a finite surface using high-fidelity simulation. As a model …

Far field wake vortex evolution of two aircraft formation flight and implications on young contrails

S Unterstrasser, A Stephan - The Aeronautical Journal, 2020 - cambridge.org
Large-eddy simulations (LES) have been employed to investigate the far-field four-vortex
wake vortex evolution over 10min behind an aircraft formation. In formation flight scenarios …

Experiments on tip vortices interacting with downstream wings

C Chen, Z Wang, I Gursul - Experiments in Fluids, 2018 - Springer
The interaction of meandering tip vortices shed from a leading wing with a downstream wing
was investigated experimentally in a water tunnel using flow visualization, particle image …

The contrail mitigation potential of aircraft formation flight derived from high-resolution simulations

S Unterstrasser - Aerospace, 2020 - mdpi.com
Formation flight is one potential measure to increase the efficiency of aviation. Flying in the
upwash region of an aircraft's wake vortex field is aerodynamically advantageous. It saves …

Analysis of tip vortex near-wake evolution for stationary and oscillating wings

DJ Garmann, MR Visbal - AIAA Journal, 2017 - arc.aiaa.org
A numerical study is conducted to characterize the tip vortex unsteady evolution on a
rounded-tip NACA0012 wing of aspect ratio operating at a Reynolds number of R e= 2.0× 10 …

Structure of a streamwise-oriented vortex incident upon a wing

C McKenna, M Bross, D Rockwell - Journal of Fluid Mechanics, 2017 - cambridge.org
Impingement of a streamwise-oriented vortex upon a fin, tail, blade or wing represents a
fundamental class of flow–structure interaction that extends across a range of applications. It …

On the effects of vertical offset and core structure in streamwise-oriented vortex–wing interactions

CJ Barnes, MR Visbal, PG Huang - Journal of Fluid Mechanics, 2016 - cambridge.org
This article explores the three-dimensional flow structure of a streamwise-oriented vortex
incident on a finite aspect-ratio wing. The vertical positioning of the incident vortex relative to …