Publications related to Stall (fluid dynamics)

The dynamics and timescales of static stall

Karen Ann J Mulleners, Sébastien Le Fouest, Julien Dominique Claude Deparday

Airfoil stall plays a central role in the design of safe and efficient lifting surfaces. We typically distinguish between static and dynamic stall based on the unsteady rate of change of an airfoil’s angle of attack. Despite the somewhat misleading denotat ...

2021

Robotic Elytra: Insect-Inspired Protective Wings for Resilient and Multi-Modal Drones

Dario Floreano, Charalampos Vourtsis, William John Stewart

Winged drones that fly in close proximity to obstacles or that are capable of aerial and terrestrial locomotion can benefit from protective systems that prevent damage to delicate aerial structures. Existing protective solutions focus on multi-copter drone ...

2021

Experimental investigation and analytical modelling of active yaw control for wind farm power optimization

Fernando Porté Agel, Haohua Zong

In this study, the physics and effectiveness of active yaw control under various wind conditions are investigated systematically, based on wind tunnel experiments and a new analytical wind farm model. The power and wake velocity measurements of a three-row ...

PERGAMON-ELSEVIER SCIENCE LTD2021

Stall Delay and Leading-Edge Suction for a Pitching Airfoil with Trailing-Edge Flap

Karen Ann J Mulleners, Julien Dominique Claude Deparday, Guosheng He

The flow around a pitching NACA0015 airfoil with an oscillating trailing-edge flap is experimentally investigated to characterize the influence of the flap kinematics on the development of dynamic stall. We specifically focus on the timing of the stall dev ...

2020

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

Karen Ann J Mulleners, Sébastien Le Fouest, Sabrina Henne

Vertical axis wind turbines have several attractive features in the context of energy production in urban areas, but the inherent aerodynamic complexity of the flow around them has challenged their development on a larger scale. They generally operate at l ...

2020

A point vortex transportation model for yawed wind turbine wakes

Fernando Porté Agel, Haohua Zong

In this study, stereo particle imaging velocimetry measurements are performed at multiple streamwise locations behind a yawed wind turbine to reveal the formation mechanisms of the counter-rotating vortex pair (CVP), and a point vortex transportation (PVT) ...

CAMBRIDGE UNIV PRESS2020

An Assessment of the State-of-the-Art from the 2019 ARO Dynamic Stall Workshop

Karen Ann J Mulleners, Fatma Ayancik Cinoglu

Dynamic stall has been a limiting factor in design and operation on rotating systems within the rotorcraft, propulsion, and sustainable energy disciplines for more than forty years, impacting operational performance and component fatigue. In the last decad ...

2020

A bioinspired Separated Flow wing provides turbulence resilience and aerodynamic efficiency for miniature drones

Stefano Mintchev, Matteo Di Luca

Small-scale drones have enough sensing and computing power to find use across a growing number of applications. However, flying in the low-Reynolds number regime remains challenging. High sensitivity to atmospheric turbulence compromises vehicle stability ...

AMER ASSOC ADVANCEMENT SCIENCE2020

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Stall (fluid dynamics)

The dynamics and timescales of static stall

Robotic Elytra: Insect-Inspired Protective Wings for Resilient and Multi-Modal Drones

Experimental investigation and analytical modelling of active yaw control for wind farm power optimization

Effects of leading-edge separation on the vortex-induced vibration of an elongated bluff body

Stall Delay and Leading-Edge Suction for a Pitching Airfoil with Trailing-Edge Flap

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

A point vortex transportation model for yawed wind turbine wakes

An Assessment of the State-of-the-Art from the 2019 ARO Dynamic Stall Workshop

A bioinspired Separated Flow wing provides turbulence resilience and aerodynamic efficiency for miniature drones

Graph Chatbot

Chat with Graph Search

The dynamics and timescales of static stall

Robotic Elytra: Insect-Inspired Protective Wings for Resilient and Multi-Modal Drones

Experimental investigation and analytical modelling of active yaw control for wind farm power optimization

Effects of leading-edge separation on the vortex-induced vibration of an elongated bluff body

Stall Delay and Leading-Edge Suction for a Pitching Airfoil with Trailing-Edge Flap

A point vortex transportation model for yawed wind turbine wakes

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

An Assessment of the State-of-the-Art from the 2019 ARO Dynamic Stall Workshop

A bioinspired Separated Flow wing provides turbulence resilience and aerodynamic efficiency for miniature drones