Results 31 to 40 of about 2,947,910 (287)
Combined Effect of Rotational Augmentation and Dynamic Stall on a Horizontal Axis Wind Turbine
Energies, 2019 Rotational augmentation and dynamic stall have been extensively investigated on horizontal axis wind turbines (HAWTs), but usually as separate topics. Although these two aerodynamic phenomena mainly determine the unsteady loads and rotor performance, the
Chengyong Zhu, Tongguang Wang, Wei Zhong
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Study on Dynamic Stall Control of Rotor Airfoil Based on Coflow Jet
International Journal of Aerospace Engineering, 2020 In this study, a dynamic stall control strategy, called the co-flow jet (CFJ), is applied to the rotor airfoil. The effect of the CFJ on the unsteady dynamic stall characteristics of the rotor airfoil is numerically investigated via numerical simulations
Jiaqi Liu +4 more
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Numerical Study on Dynamic-Stall Characteristics of Finite Wing and Rotor
Applied Sciences, 2019 To study the three-dimensional effects on the dynamic-stall characteristics of a rotor blade, the unsteady flowfields of the finite wing and rotor were simulated under dynamic-stall conditions, respectively. Unsteady Reynolds-averaged Navier⁻Stokes
Qing Wang, Qijun Zhao
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Dynamic Stall Control: A Review
The control of dynamic stall associated with wind turbine and helicopter blades, fixed-wings, flapping wings, as well as alternating flow separation and attachment produced by cyclical control inputs, is reviewed. Different airfoil and wing stall types are described, control metrics are identified, and the generality of harmonic pitch oscillations is ...
Greenblatt, David
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Numerical simulation study on dynamic stall of airfoil controlled by combined blow-suction
Hangkong gongcheng jinzhan, 2023 One of the key problems to improve the aerodynamic characteristics of airfoil is to solve the dynamic stall.This paper presents a method to control the dynamic stall of airfoil by using the combination of leading-edge suction and trailing edge suction ...
JIA Tianhao +3 more
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Dynamic stall measurements on airfoils [PDF]
PAMM, 2007 AbstractWe present a new method for measuring the lift forces acting on an airfoil segment under dynamic stall conditions. Thereby the pressure distribution over the wind tunnel walls is detected by an adequate number of pressure sensors. The airfoil is rotated by a stepping motor with angular velocities up to 300°/s.
Gerrit Wolken‐Möhlmann +2 more
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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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A stall diagnosis method based on entropy feature identification in axial compressors
International Journal of Mechanical System Dynamics, 2023 A stall diagnosis method based on the entropy feature extraction algorithm is developed in axial compressors. The reliability of the proposed method is determined and a parametric sensitivity analysis is experimentally conducted for two different types ...
Yang Liu +5 more
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Implementation and validation of a numerical model for dynamic stall simulation in helicopter airfoils [PDF]
, 2022 Dynamic stall is one of the most complex aerodynamic phenomenon and it affects the perfor- mance of a wide variety of fluid machinery. Previous works show a lack of reliability and accuracy in the development of a stable CFD prediction model.
Ciavarella, Christopher
core
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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