Flow control for unmanned air vehicles
D Greenblatt, DR Williams - Annual Review of Fluid Mechanics, 2022 - annualreviews.org
The pervasiveness of unmanned air vehicles (UAVs), from insect to airplane scales,
combined with active flow control maturity, has set the scene for vehicles that differ markedly …
combined with active flow control maturity, has set the scene for vehicles that differ markedly …
Resolvent-analysis-based design of airfoil separation control
We use resolvent analysis to design active control techniques for separated flows over a
NACA 0012 airfoil. Spanwise-periodic flows over the airfoil at a chord-based Reynolds …
NACA 0012 airfoil. Spanwise-periodic flows over the airfoil at a chord-based Reynolds …
Cluster-based feedback control of turbulent post-stall separated flows
We propose a cluster-based control strategy for feedback control of post-stall separated
flows over an airfoil. The present approach partitions the flow trajectories (force …
flows over an airfoil. The present approach partitions the flow trajectories (force …
Resolvent analysis of an airfoil laminar separation bubble at
We perform a resolvent analysis to examine the perturbation dynamics over the laminar
separation bubble (LSB) that forms near the leading edge of a NACA 0012 airfoil at a chord …
separation bubble (LSB) that forms near the leading edge of a NACA 0012 airfoil at a chord …
Analysis of the onset and evolution of a dynamic stall vortex on a periodic plunging aerofoil
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 …
eddy simulations of an SD7003 aerofoil undergoing periodic plunging motion in a …
Flow imaging as an alternative to non-intrusive measurements and surrogate models through vision transformers and convolutional neural networks
A numerical framework is proposed whereby flow imaging data are leveraged to extract
relevant information from flowfield visualizations. To this end, a vision transformer (ViT) …
relevant information from flowfield visualizations. To this end, a vision transformer (ViT) …
Investigation of transition and its active control in separation bubbles for a wing section at Re= 200k: dns, theory, and experiments
S Hosseinverdi, A Grille Guerra, HF Fasel… - AIAA Scitech 2022 …, 2022 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2022-2329. vid The fundamental flow
physics of transition in uncontrolled and controlled separation bubbles for a modified NACA …
physics of transition in uncontrolled and controlled separation bubbles for a modified NACA …
Pitch–Plunge Equivalence in Dynamic Stall of Ramp Motion Airfoils
Large-eddy simulations (LES) are employed to investigate the pitch–plunge equivalence of
an SD7003 airfoil undergoing constant ramp motions at Reynolds number R e= 6× 10 4. The …
an SD7003 airfoil undergoing constant ramp motions at Reynolds number R e= 6× 10 4. The …
Extending the Reynolds number range of high-frequency control of dynamic stall
A recently proposed high-frequency control concept for dynamic-stall mitigation is
demonstrated using large-eddy simulation of a pitching NACA 0012 airfoil at a chord …
demonstrated using large-eddy simulation of a pitching NACA 0012 airfoil at a chord …
Effects of leading-edge geometry on the onset of dynamic stall
S= spanwise extent of grid section s= surface distance t= time t0= acceleration period for
ramp motion U∞= freestream velocity x; y; z= Cartesian coordinate α= angle of attack …
ramp motion U∞= freestream velocity x; y; z= Cartesian coordinate α= angle of attack …