Results 21 to 30 of about 4,618,854 (237)
Aerospace Science and Technology, 2021 The dynamic stall phenomenon is characterized by the formation of a leading-edge vortex, which is responsible for adverse aerodynamic forces and moments adversely impacting the structural strength and life of a system. Aerodynamic shape optimization (ASO)
Vishal Raul, Leifur Þ. Leifsson
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Analysis of the onset and evolution of a dynamic stall vortex on a periodic plunging aerofoil
Journal of Fluid Mechanics, 2022 The onset and evolution of the dynamic stall vortex (DSV) are analysed by means of large eddy simulations of an SD7003 aerofoil undergoing periodic plunging motion in a transitional Reynolds number flow ($Re =6\times 10^{4}$).
R. Miotto +3 more
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Experimental Study of Dynamical Airfoil and Aerodynamic Prediction
Actuators, 2022 Dynamic stall is a critical limiting factor for airfoil aerodynamics and a challenging problem for active flow control. In this experimental study, dynamic stall was measured by high-frequency surface pressure tapes and pressure-sensitive paint (PSP ...
Zheyu Shi +3 more
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Numerical Simulation of a Pitching Airfoil Under Dynamic Stall of Low Reynolds Number Flow [PDF]
Journal of Aerospace Technology and Management, 2019 In this research, viscous, unsteady and turbulent fluid flow is simulated numerically around pitching NACA0012 airfoil in the dynamic stall area. The Navier-Stokes equations are discretized based on the finite volume method and are solved by the PIMPLE ...
Mojtaba Honarmand +3 more
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Lithosphere, 2013 Recent seismic imaging of the mantle beneath western North America reveals complexities interpreted as structures ranging from plumes to lithospheric drips and slab fragments. A prominent high-velocity "curtain" beneath Idaho has been interpreted as a remnant of the subducted Farallon plate left dangling within the upper mantle since >40 Ma ...
Burkett, Erin, Gurnis, Michael
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Study on the effect of raindrops on the dynamic stall of a NACA-0012 airfoil
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2022 In this study the pure effect of raindrops on dynamic stall of a pitching airfoil has been investigated. The simulation was performed at Reynolds number of 106\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts ...
Armin Sheidani +2 more
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A vorticity-based criterion to characterise leading edge dynamic stall onset
Journal of Fluid Mechanics, 2022 We propose a more conservative, physically-intuitive criterion, namely, the boundary enstrophy flux ($BEF$), to characterise leading-edge-type dynamic stall onset in incompressible flows.
S. Sudharsan +2 more
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Dynamic Stall Measurements [PDF]
PAMM, 2009 AbstractForces acting statically on an airfoil in laminar flow are well known. Under turbulent conditions dynamic effects (like dynamic stall) take place. There are different theoretical models to describe dynamic stall, but very little experimental data.
Jörge Schneemann +2 more
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, 2021 The current design of vertical axis wind turbines (VAWTs) suffers from inevitable change in tip speed ratio, λ, in variant wind conditions due to fixed rotor speed.
M. R. Tirandaz, A. Rezaeiha
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The effects of turbulence modeling on dynamic stall [PDF]
Acta MechanicaA numerical investigation of the flow evolution over a pitching NACA 0012 airfoil incurring in deep dynamic stall phenomena is presented. The experimental data at Reynolds number Re = 135, 000 and reduced frequency k = 0.1, provided by Lee and Gerontakos,
G. Baldan +3 more
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