Results 41 to 50 of about 4,618,854 (237)
The dynamics and timescales of static stall
Journal of Fluids and Structures, 2021 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 denotation, the force and flow development of an airfoil undergoing static stall are highly unsteady and ...
Sébastien Le Fouest +2 more
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Experimental Study on Dynamic Stall of Airfoil in Rotor Reverse Flow Region
Aerospace, 2023 The large reverse flow region of the rotor with a high advance ratio is an important factor that affects the performance improvement of helicopters. This paper examines the dynamic stall of the airfoil in the reverse flow region of the rotor to develop a
Weihong Kong, You Li
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Cartographing dynamic stall with machine learning [PDF]
Wind Energy Science, 2020 Once stall has set in, lift collapses, drag increases and then both of these forces will fluctuate strongly. The result is higher fatigue loads and lower energy yield. In dynamic stall, separation first develops from the trailing edge up the leading edge.
M. Lennie +3 more
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A WaveNet-based fully stochastic dynamic stall model [PDF]
Wind Energy Science, 2022 Accurate modeling of the dynamic stall remains a challenge for the design and construction of turbine blades and helicopter rotors. At the same time, wind turbines, for instance, are becoming steadily larger, further increasing the demands on their ...
J.-P. Küppers, T. Reinicke
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Separation Control on Oscillating Airfoils Using Moving Surface Control
NUST Journal of Engineering Sciences, 2008 A numerical investigation has been conducted to study the effectiveness of Moving Surface Control method in controlling dynamic stall in oscillating airfoils.
S. R. Sheikh, Omar A. Qazi
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Energies, 2020 Passive vortex generators (VGs) have been widely applied on wind turbines to boost the aerodynamic performance. Although VGs can delay the onset of static stall, the effect of VGs on dynamic stall is still incompletely understood.
Chengyong Zhu +3 more
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Physics of Dynamic Stall Vortex During Pitching Oscillation of Dynamic Airfoil
International Journal of Aeronautical and Space Sciences, 2021 Dynamic stall, which has a significant effect on the aerodynamic performances of dynamic airfoils, is closely related to the physics of the dynamic stall vortex (DSV).
Binbin Wei, Yongwei Gao, Dong Li
semanticscholar +1 more source
Development and evaluation of an aerodynamic model for a novel vertical axis wind turbine concept [PDF]
, 2013 There has been a resurgence of interest in the development of vertical axis wind turbines which have several inherent attributes that offer some advantages for offshore operations, particularly their scalability and low over-turning moments with better ...
Shires, A, Andrew Shires, Shires, Andrew
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Dynamic stall control over a rotor airfoil based on AC DBD plasma actuation
Advances in Aerodynamics, 2021 At present, the control capability of dielectric barrier discharge (DBD) plasma actuation covers the flow velocity range of helicopter’s retreating blades, so it is necessary to extend it to the dynamic stall control of rotor airfoils.
Guangyin Zhao +4 more
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Analysis of dynamic stall characteristics of rotor airfoil in pitching motion state
Kongqi donglixue xuebaoDynamic stall affects the aerodynamic characteristics of rotor airfoils. The aerodynamic performance of helicopter rotors is restricted by dynamic stall.
Haonan Xing +8 more
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