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New Progress in Research on Dynamic Stall of Helicopter Rotors
Nanjing Hangkong Hangtian Daxue XuebaoFor over half a century， rotor dynamic stall has remained a key research focus and challenge in helicopter aerodynamics. Through persistent and in-depth exploration， researchers have achieved significant progress in measurement and prediction of rotor ...
JING Simeng +4 more
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Compressible dynamic stall control using dynamic shape adaptation
AIAA Journal, 2001 (AIAA Paper 99-0655), AIAA Journal, Vol. 39, No. 10, pp. 2021-2024, Oct. 2001. The approaches of compressible dynamic stall control using real-time airfoil adaptation and slatted airfoils are compared. Each method attempts to solve the unsteady flow separation and the underlying causes differently.
Chandrasekhara, M. S. +2 more
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Study on the Flow Control of the Airfoil Dynamic Stall Using the Co-flow Jet
Hangkong gongcheng jinzhan, 2018 Dynamic stall control is of great significance for enhancement of the airfoil aerodynamic characteristics. In the present study, the co-flow jet(CFJ) flow control method is numerically investigated to control the dynamic stall caused by the pitching ...
Yang Huiqiang, Xu Heyong, Ye Zhengyin
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Competing Mechanisms of Compressible Dynamic Stall
AIAA Journal, 1998 Earlier experiments have documented the onset of compressible dynamic stall either from the bursting of a leading-edge laminar separation bubble or from a leading-edge shock, depending on the Reynolds number and Mach number. For certain combinations of conditions, the supersonic flow and the bubble dynamics compete with each other.
Chandrasekhara, M.S. +2 more
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Large eddy simulation of dynamic stall over an airfoil and its control with plasma actuator
AIP Advances, 2023 The purpose of this study is to investigate deep dynamic stall over a pitching National Advisory Committee for Aeronautics 0015 airfoil and its control with an alternating current dielectric barrier discharge (AC-DBD) plasma actuator by means of large ...
Hengyang Zhang +3 more
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Numerical Investigation of a Dynamic Stall on a Single Rotating Blade
Aerospace, 2021 Dynamic stall is a phenomenon on the retreating blade of a helicopter which can lead to excessive control loads. In order to understand dynamic stall and fill the gap between the investigations on pitching wings and full helicopter rotor blades, a ...
Yin Ruan, Manfred Hajek
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Near Stall Unsteady Flow Responses to Morphing Flap Deflections
Fluids, 2021 The unsteady flow characteristics and responses of an NACA 0012 airfoil fitted with a bio-inspired morphing trailing edge flap (TEF) at near-stall angles of attack (AoA) undergoing downward deflections are investigated at a Reynolds number of 0.62 × 106 ...
Chawki Abdessemed +2 more
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Dynamic Stall Characteristics of Thick Wind Turbine Airfoils
Wind EnergyThis paper studies the dynamic stall characteristics of thick flatback and nonflatback wind turbine airfoils. Two airfoils with a maximum thickness of 35% were studied, with trailing edge thicknesses of 2% and 10%, respectively.
Mehdi Doosttalab +4 more
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Numerical Investigations of Dynamic Stall Control [PDF]
INCAS Bulletin, 2014 In this paper we investigated numerically the dynamic stall phenomenon and the possibilities to control it, with application to vertical axis wind turbines (for urban users).
Florin FRUNZULICA +2 more
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Development of a second-order dynamic stall model [PDF]
Wind Energy Science, 2020 Dynamic stall phenomena carry the risk of negative damping and instability in wind turbine blades. It is crucial to model these phenomena accurately to reduce inaccuracies in predicting design driving (fatigue and extreme) loads. Some of the inaccuracies
N. Adema, M. Kloosterman, G. Schepers
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