Results 1 to 10 of about 71,884 (152)
Cluster-based feedback control of turbulent post-stall separated flows [PDF]
Journal of Fluid Mechanics, 2018 We propose a novel model-free self-learning cluster-based control strategy for general nonlinear feedback flow control technique, benchmarked for high-fidelity simulations of post-stall separated flows over an airfoil. The present approach partitions the
Brunton, Steven L. +5 more
core +2 more sources
Laminar post-stall wakes of tapered swept wings [PDF]
Journal of Fluid Mechanics, 2023 While tapered swept wings are widely used, the influence of taper on their post-stall wake characteristics remains largely unexplored. To address this issue, we conduct an extensive study using direct numerical simulations to characterize the wing taper ...
J. Ribeiro +5 more
semanticscholar +1 more source
All you need is time to generalise the Goman–Khrabrov dynamic stall model [PDF]
Journal of Fluid Mechanics, 2021 Dynamic stall on airfoils negatively impacts their aerodynamic performance and can lead to structural damage. Accurate prediction and modelling of the dynamic stall loads are crucial for a more robust design of wings and blades that operate under ...
F. Ayancik, K. Mulleners
semanticscholar +1 more source
Journal of Fluid Mechanics, 2023 The effect of variations in the integral length scale of incoming free-stream turbulence on a NACA0012 wing is investigated with the use of force, moment and particle image velocimetry measurements. At a chord-based Reynolds number ($Re = U_\infty c/\nu$
C. Thompson +3 more
semanticscholar +1 more source
Journal of Applied Fluid Mechanics, 2023 In order to upsurge the maneuverability of micro aerial vehicles, a tubercle leading edge inspired by the whale flipper was applied as a passive stall control method.
A. Nikkhoo, A. Esmaeili
semanticscholar +1 more source
Journal of Applied Fluid Mechanics, 2023 This paper provides 2D Computational Fluid Dynamics (CFD) investigations, using OpenFOAM package, of the unsteady separated fully turbulent flows past a NACA 0015 airfoil undergoing sinusoidal pitching motion about its quarter-chord axis in deep stall ...
S. Ouchene, A. Smaili, H. Fellouah
semanticscholar +1 more source
Analysis of the onset and evolution of a dynamic stall vortex on a periodic plunging aerofoil
Journal of Fluid Mechanics, 2022 The onset and evolution of the dynamic stall vortex (DSV) are analysed by means of large eddy simulations of an SD7003 aerofoil undergoing periodic plunging motion in a transitional Reynolds number flow ($Re =6\times 10^{4}$).
R. Miotto +3 more
semanticscholar +1 more source
Linear modal instabilities around post-stall swept finite wings at low Reynolds numbers [PDF]
Journal of Fluid Mechanics, 2021 Linear modal instabilities of flow over untapered wings with aspect ratios $AR=4$ and 8, based on the NACA 0015 profile, have been investigated numerically over a range of angles of attack, $\alpha$, and angles of sweep, $\varLambda$, at chord Reynolds ...
A. Burtsev +5 more
semanticscholar +1 more source
Boundary Layer Separation and Reattachment Detection on Airfoils by Thermal Flow Sensors
Sensors, 2012 A sensor concept for detection of boundary layer separation (flow separation, stall) and reattachment on airfoils is introduced in this paper. Boundary layer separation and reattachment are phenomena of fluid mechanics showing characteristics of ...
Peter Busche +4 more
doaj +1 more source
Quadrupole noise generated from a low-speed aerofoil in near- and full-stall conditions
Journal of Fluid Mechanics, 2022 In this paper, direct numerical simulations are performed for low-speed flows past a NACA0012 aerofoil at high incidence angles. The aim is to investigate the significance of quadrupole noise generated due to separated shear layers, in comparison to ...
Jacob M. Turner, J. Kim
semanticscholar +1 more source