Journal ArticleDOI
Numerical modeling of an S809 airfoil under dynamic stall, erosion and high reduced frequencies
Kobra Gharali,David A. Johnson +1 more
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TLDR
In this article, an oscillating freestream over a stationary S809 airfoil is simulated numerically using ANSYS Fluent 12.1 and compared with aerodynamic coefficients from existing experimental and semi-empirical data.About:
This article is published in Applied Energy.The article was published on 2012-05-01. It has received 108 citations till now. The article focuses on the topics: Airfoil & Leading edge.read more
Citations
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Computational fluid dynamics (CFD) mesh independency techniques for a straight blade vertical axis wind turbine
TL;DR: In this paper, the authors numerically investigated four methods, namely mesh refinement, General Richardson Extrapolation (GRE), Grid Convergence Index (GCI), and the fitting method, to obtain a mesh independent solution for a straight blade vertical axis wind turbine (SB-VAWT) power curve using computational fluid dynamics (CFD).
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2.5D large eddy simulation of vertical axis wind turbine in consideration of high angle of attack flow
TL;DR: In this paper, the feasibility and accuracy of three different CFD approaches, namely 2D URANS, 2.5D LES, and 2D large eddy simulations (LES), were investigated in the aerodynamic characterization of straight-bladed VAWT (SBVAWT), with a focus on the capability of the two.5d LES approach in CFD simulation of high angle of attack (AOA) flow.
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The effects of aerofoil profile modification on a vertical axis wind turbine performance
TL;DR: In this paper, the authors investigated the effect of profile-modifications on a NACA-0015 aerofoil used in VAWTs (vertical axis wind turbines).
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A critical review on the simulations of wind turbine aerodynamics focusing on hybrid RANS-LES methods
TL;DR: The hybrid RANS-LES method (HRLM) as mentioned in this paper is a technique to bridge the gap between less accurate RANS and more computational costly LES method, which is a remedy to turbine aerodynamics in complex flow conditions.
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Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review
TL;DR: In this article, an overview of the commonly used models, techniques, tools, and experimental approaches applied to increase the efficiency of the wind turbines is presented, with particular emphasis on approaches used to design wind turbine blades both experimental and numerical.
References
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Journal ArticleDOI
Viscous-inviscid analysis of transonic and low Reynolds number airfoils
Mark Drela,Michael B. Giles +1 more
TL;DR: In this article, a method of accurately calculating transonic and low Reynolds number airfoil flows, implemented in the viscous-inviscid design/analysis code ISES, is presented.
Journal ArticleDOI
Vortical patterns in the wake of an oscillating airfoil
TL;DR: In this article, the vortical flow patterns in the wake of a NACA 0012 airfoil pitching at small amplitudes were studied in a low speed water channel, and it was shown that a great deal of control can be exercised on the structure of the wake by the control of the frequency, amplitude and also the shape of the oscillation waveform.
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MTV measurements of the vortical field in the wake of an airfoil oscillating at high reduced frequency
TL;DR: In this article, molecular tagging velocimetry is used to quantify the characteristics of the vortex array (circulation, peak vorticity, core size, spatial arrangement) and its downstream evolution over the first chord length as a function of reduced frequency.
ReportDOI
Effects of grit roughness and pitch oscillations on the S809 airfoil
TL;DR: In this article, an S809 airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 3{times}5 subsonic wind tunnel under steady flow and stationary model conditions, and also with the model undergoing pitch oscillations.
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Dynamic stall modelling of the S809 aerofoil and comparison with experiments
Sandeep Gupta,J. Gordon Leishman +1 more
TL;DR: In this paper, an analysis of dynamic stall for the S809 aerofoil has been performed in conjunction with the Leishman-Beddoes dynamic stall model that was modified for wind turbine applications.