On the study of transitional low-Reynolds number flows over airfoils operating at high angles of attack and their prediction using transitional turbulence models

J Wauters, J Degroote - Progress in Aerospace Sciences, 2018 - Elsevier
In this survey paper transitional turbulence modeling is approached from the point of view
relevant to small unmanned aerial vehicles (span≈ 1 m), of which the flow is characterized …

Influence of free-stream turbulence intensity on static and dynamic stall of a NACA 0018 aerofoil

L Damiola, MF Siddiqui, MC Runacres… - Journal of Wind …, 2023 - Elsevier
In many engineering applications, aerofoils experience elevated free-stream turbulence
levels. The present work experimentally investigates the effect of free-stream turbulence on …

Lift regulation during transverse gust encounters using a modified Goman–Khrabrov model

G Sedky, AR Jones, FD Lagor - AIAA Journal, 2020 - arc.aiaa.org
This paper presents a framework for the estimated state regulation of the lift force for a
maneuvering wing during a transverse gust encounter. An expression for the effective angle …

A data-driven nonlinear state-space model of the unsteady lift force on a pitching wing

MF Siddiqui, T De Troyer, J Decuyper… - Journal of Fluids and …, 2022 - Elsevier
Accurate unsteady aerodynamic models are essential to estimate the forces on rapidly
pitching wings and to develop model-based controllers. As system identification is arguably …

Gust encounters of rigid wings: Taming the parameter space

AR Jones - Physical Review Fluids, 2020 - APS
One of the primary challenges in the study of gust encounters lies in isolating, defining, and
parametrizing a specific problem in a highly unsteady, three-dimensional, and multiscale …

Investigation of static wings interacting with vertical gusts of indefinite length at low Reynolds numbers

C Stutz, J Hrynuk, D Bohl - Experiments in Fluids, 2022 - Springer
A novel gust generator was developed to study the interaction of wings with vertical gusts of
controllable interaction time with magnitudes up to 30% of the freestream velocity at low …

Unsteady lift and moment of a periodically plunging airfoil

N Chiereghin, DJ Cleaver, I Gursul - AIAA Journal, 2019 - arc.aiaa.org
To simulate the effects of gusts and maneuvers, lift, moment, and flow measurements are
presented for a periodically plunging airfoil at a Reynolds number of 20,000 over a wide …

Low-order model for prediction of trailing-edge separation in unsteady flow

S Narsipur, A Gopalarathnam, JR Edwards - AIAA Journal, 2019 - arc.aiaa.org
Computational and experimental results for pitching and plunging airfoils were used to study
the time lag associated with boundary-layer convection and to develop a model that can be …

Deep learning predictions of unsteady aerodynamic loads on an airfoil model pitched over the entire operating range

A Mohamed, D Wood - Physics of Fluids, 2023 - pubs.aip.org
For the design and certification of wind turbines, it is essential to provide fast and accurate
unsteady aerodynamic load prediction models for the whole operational range of angle of …

Characterization of unsteady separation in a turbulent boundary layer: mean and phase-averaged flow

F Ambrogi, U Piomelli, DE Rival - Journal of Fluid Mechanics, 2022 - cambridge.org
A spatially developing turbulent boundary layer subject to a space-and time-dependent
pressure gradient is analysed via large-eddy simulation. The unsteadiness is prescribed by …