Results 171 to 180 of about 4,618,854 (237)

An assessment of the impact of compressibility on dynamic stall [PDF]

33rd Aerospace Sciences Meeting and Exhibit, 1995
ARO-MIPR-125 ...
Carr, L.W., Chandrasekhara, M.S.
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Experimental investigation of dynamic stall flow control for wind turbine airfoils using a plasma actuator

Energy, 2019
Because of the deterioration of aerodynamic performance of airfoils due to the dynamic stall of large wind turbine blades, a miniaturised remote-wireless-controlled actuating power supply and dielectric barrier discharge plasma actuator based on car ...
Guoqiang Li, Weiguo Zhang, Yubiao Jiang, Pengyu Yang   +3 more
exaly   +2 more sources

Dynamic airfoil stall investigations

, 1992
Experimental and computational investigations of the dynamic stall phenomenon continue to attract the attention of various research groups in the major aeronautical research laboratories. There are two reasons for this continued research interest. First, the occurrence of dynamic stall on the retreating blade of helicopters imposes a severe performance
Platzer, M.F., Chandrasekhara, M.S., Ekaterinaris, J.A., Carr, L.W.   +3 more
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On computational simulations of dynamic stall and its three-dimensional nature

The Physics of Fluids, 2023
In this paper, we investigate the three-dimensional nature of dynamic stall. Conducting the investigation, the flow around a harmonically pitching National Advisory Committee for Aeronautics (NACA) 0012 airfoil is numerically simulated using Unsteady ...
N. Khalifa, A. Rezaei, Haithem E. Taha
semanticscholar   +1 more source

Fast flow prediction of airfoil dynamic stall based on Fourier neural operator

The Physics of Fluids, 2023
Dynamic stall on airfoil is of great importance in engineering applications. In the present work, Fourier neural operator (FNO) is applied to predict flow fields during the dynamic stall process of the NACA0012 airfoil. Two cases with different angles of
Deying Meng, Yiding Zhu, Jianchun Wang, Yipeng Shi   +3 more
semanticscholar   +1 more source

Machine learning-based optimization of a pitching airfoil performance in dynamic stall conditions using a suction controller

The Physics of Fluids, 2023
Flow separation control on oscillating airfoils is crucial for enhancing the efficiency of turbine blades. In this study, a genetic algorithm was employed to optimize the configuration of a pure suction jet actuator on an oscillating airfoil at a ...
Saman Kasmaiee, M. Tadjfar, Siroos Kasmaiee   +2 more
semanticscholar   +1 more source

Dynamic stall at high Reynolds numbers induced by ramp-type pitching motions

Journal of Fluid Mechanics, 2022
The transient pressure field around a moderately thick airfoil is studied as it undergoes ramp-type pitching motions at high Reynolds numbers and low Mach numbers.
J. Kiefer, C. Brunner, M. Hansen, M. Hultmark   +3 more
semanticscholar   +1 more source

Dynamic Stall of Pitching Tubercled Wings in Vortical Wake Flowfield

The Physics of Fluids, 2022
In consideration of the turbulent inflow condition of engineering applications, the flow mechanisms of dynamic stall of a tubercled airfoil have been comprehensively analyzed with an upstream cylinder. Numerical simulation of the flowfield of a tubercled
Ming Zhao, Lianchao Xu, Xiaojian Li, Yijia Zhao, Zhengxian Liu   +4 more
semanticscholar   +1 more source

Influence of Rotation on Dynamic Stall

Journal of the American Helicopter Society, 2013
A computational investigation of the effect of rotation on two-dimensional (2D) deep dynamic stall has been undertaken, showing that the effect of rotation is to reduce the severity of the pitching moment peak and cause earlier reattachment of the flow. A generic single blade rotor geometry was investigated, which had a pitching oscillation around the
Gardner, Anthony Donald, Richter, Kai
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Critical indicators of dynamic stall vortex

Journal of Fluid Mechanics, 2022
During a dynamic stall process, various flow structures leave their pressure footprints on a wing surface, through which it is possible to understand the development of different flow stages and predict the critical flow events.
Xiao Li, Lihao Feng
semanticscholar   +1 more source