Experimental study of wind-turbine airfoil aerodynamics in high turbulence

Devinant, Philippe; Laverne, Thomas; Hureau, J

doi:10.1016/s0167-6105(02)00162-9

Cited by 140 publications

(77 citation statements)

References 9 publications

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“…In spite of their importance, the experimental lift and drag data for low Re c are only available for some airfoils, and seldom beyond stall angle of attack. Among others, Critzos et al (1955), Sheldahl and Klimas (1981), Michos et al (1983) and Devinant et al (2002) presented the test data of NACA0012 airfoil for a = 0-90°at Re c = 3.6 Â 10 5 -1.8 Â 10 6 . Using force balance to measure lift and drag at Re c = 1 Â 10 5 -7 Â 10 5 and a = 0-90°, Devinant et al (2002) showed that lift grew from zero to a maximum for increasing a between zero and stall, and then tumbled suddenly at stall, which occurred at a = 8-20°, depending on Re c .…”

mentioning

confidence: 99%

Fluid forces on a very low Reynolds number airfoil and their prediction

Zhou

Alam

Yang

et al. 2011

International Journal of Heat and Fluid Flow

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mentioning

confidence: 99%

Fluid forces on a very low Reynolds number airfoil and their prediction

Zhou

Alam

Yang

et al. 2011

International Journal of Heat and Fluid Flow

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“…Earliest of these studies was done using grid induced turbulence [19], showing that with increase in FST, stall angle increases [20]. Studies done using NACA airfoil showed good match with the findings in [20], and in addition it also reported an increase in the maximum value of L C [21]. Studies done by Swalwell [22] showed a delay in stall and increase in maximum lift coefficient with increase in FST.…”

Section: Introductionmentioning

confidence: 73%

DNS of Low Reynolds Number Aerodynamics in the Presence of Free Stream Turbulence

Bagade¹,

Krishnan²,

Sengupta³

2015

FAE

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Here, Direct Numerical Simulation (DNS) of low Reynolds number (Re) flow in the presence of free stream turbulence (FST) pertaining to micro-aerial vehicle (MAV) is reported. The focus is on numerically simulating the flow around an airfoil at low Re to understand its behaviour using high accuracy compact schemes (T. K. Sengupta, High Accuracy Computing Methods, Cambridge University Press, New York, 2013.) [1]. In low Re aerodynamics, the flow is characterized by unsteady separation bubbles and vortex shedding from the suction surface and the trailing edge as well, which make it different from high Re aerodynamics. The maximum attainable lift coefficient and lift-to-drag ratio decreases drastically at low Re, as compared to high Re flows. Such flows are also important because of their susceptibility to background disturbances. Stalling of aircraft wing is one such phenomenon where free stream turbulence (FST) plays a crucial role. In this work, effects of FST, effects of Re and angles of attack  are studied with respect to flow separation and vortex shedding. Flow characterization is done for the AG24 airfoil, at Re =60,000 and 400,000, with and without consideration of FST in the range of angles of attack, 6 6The computational results are compared with the experimental results of Williamson et al. ( Summary of Low Speed Airfoil Data, volume 5, Dept. of Aerospace Engineering, UIUC, 2007 ) [2] and are found to be in good agreement. Flow simulation over AG24 airfoil is performed here via parallel computation, using high accuracy compact schemes for spatial discretization and optimized Runge-Kutta (ORK4) scheme for time marching [1]. This paper also discusses proper implementation of filters and FST model.

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“…A quasi-steady approach to unsteady flows based on this methodology has been developed by Cebeci and Jang (1990). In a study of the time averaged pressure and load values, Devinant (2002) showed that the aerodynamic behavior of the airfoil can be greatly affected by the turbulence level, both quantitatively and qualitatively. In particular, a considerable increase in the lift coefficient with the turbulence level was observed.…”

Section: Literature Surveymentioning

confidence: 99%

Analysis of horizontal axis wind turbine blade using CFD

Nigam¹,

Tenguria²,

Pradhan³

2017

Int. J. Eng. Sci. Tech

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Blade is very essential part of HAWT (horizontal axis wind turbine). Forces for Lift and drag on the blade has an important role in the wind turbine performance. The main purpose of this work is to perform CFD analysis of a blade and airfoil of wind turbine using k- SST model. In this present study NACA 63 4 -221 airfoil profile is taken for the modeling and then analysis of the blade. The lift and drag forces are calculated for the blade at different AOA (angle of attack). For present work the blade length is taken 38.98 meter, which is a redesigned blade for VESTAS V82-1.65MW horizontal axis wind turbine blade. Results obtained from simulation are compared with the experimental work found in literature.

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Experimental study of wind-turbine airfoil aerodynamics in high turbulence

Cited by 140 publications

References 9 publications

Fluid forces on a very low Reynolds number airfoil and their prediction

Fluid forces on a very low Reynolds number airfoil and their prediction

DNS of Low Reynolds Number Aerodynamics in the Presence of Free Stream Turbulence

Analysis of horizontal axis wind turbine blade using CFD

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