Results 41 to 50 of about 2,947,910 (287)
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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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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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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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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Experimental and numerical study on dynamic stall under a large Reynolds number
Advances in Aerodynamics, 2023 Dynamic stall under large Reynolds numbers and large reduced frequencies has a significant effect on the performance of the wind turbine blades, helicopter rotors, etc. So the dynamic stall physics of the NACA0012 airfoil under a large Reynolds number of
Binbin Wei, Yongwei Gao, Shuling Hu
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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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The Dynamics of SecM-Induced Translational Stalling
Cell Reports, 2014 SecM is an E. coli secretion monitor capable of stalling translation on the prokaryotic ribosome without cofactors. Biochemical and structural studies have demonstrated that the SecM nascent chain interacts with the 50S subunit exit tunnel to inhibit peptide bond formation.
Albert Tsai +4 more
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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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The Dynamics of Static Stall [PDF]
, 2011 The dynamic process of flow separation on a stationary airfoil in a uniform flow was investigated experimentally by means of time-resolved measurements of the velocity field and the airfoil's surface pressure distribution. The unsteady movement of the separation point, the growth of the separated region, and surface pressure fluctuations were examined ...
Mulleners, Karen +3 more
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