Micro and small-scale HAWT blades airfoils study through CFD for low wind applications

Chaudhary, Umesh; Nayak, Sisir Kumar

doi:10.1109/indicon.2015.7443703

Cited by 9 publications

(12 citation statements)

References 5 publications

(5 reference statements)

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“…One can recognize from this figure that the maximum range for the lift to drag ratio appears to be between 2° and 3.5°. The optimum angle of attack for NACA 63-415 airfoil was previously reported as between 2° and 5.25° (Vendan et al, 2010;Chaudhary and Nayak, 2015). The new result of the present study provides the optimum range for the angle of attack more accurate than the previous literature data.…”

Section: Optimum Angle Of Attacksupporting

confidence: 68%

“…National Advisory Committee for Aeronautics (NACA) 63-415 airfoil, as one of these turbine blades, has been rarely examined in literature. Additionally, studies in literature have reported inconsistent results where the optimum angle of attack is in the range of 2° to 14° (Vendan et al, 2010;Chaudhary and Nayak, 2015;Yilmaz et al 2016). Therefore, a detailed examination is still necessary for this particular type of the blade to ensure the optimum angle of attack in a precise range.…”

Section: Introductionmentioning

confidence: 99%

“…It is beneficial to examine the effect of the angle of attack on the lift to drag ratio rather than investigating the effects on both forces separately. This approach has previously been employed by several different studies in literature (Chakroun et al, 2004;Hafiz et al, 2012;Sayed et al, 2012;Chaudhary and Nayak, 2015;Patil and Thakare, 2015). The generation of electricity, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Flow Over NACA 63-415 Airfoil

Erkan

Özkan

2020

Black Sea Journal of Engineering and Science

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In this article, a two-dimensional, incompressible flow around a NACA 63-415 airfoil, which is widely used as one of the commercial wind turbine blade profiles, is investigated. The goal of this research is to obtain the optimum angle of attack for this particular type of airfoil within a precise range. The Reynolds-Averaged Navier-Stokes (RANS) technique of Computational Fluid Dynamics (CFD) has been employed to examine the flow where the Reynolds number is in the range of 10 5 to 3×10 6 and also for the angles of attack from 0° to 20°. These are the typical flow conditions mostly encountered in the real applications of wind turbine blades. The turbulent flow is modelled by means of the Spalart-Allmaras turbulence model since its capability of simulating aerodynamic flows. The ratio of the lift force to the drag force acting on the airfoil has been chosen as a control parameter since the lift force increases the power generated by the turbine, whereas the drag force negatively affects the performance. The present numerical result shows that the maximum lift to drag ratio is observed between 2.5° and 3.5°, depending on the Reynolds number. Onur ERKAN https://orcid.org/0000-0001-7488-8039 Musa ÖZKAN https://orcid.org/0000-0002-1322-3276 Cite as: Erkan O, Özkan M. 2020. Investigation of the flow over NACA 63-415 airfoil. BSJ Eng Sci, 3(2): 50-56.

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Section: Optimum Angle Of Attacksupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the Flow Over NACA 63-415 Airfoil

Erkan

Özkan

2020

Black Sea Journal of Engineering and Science

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“…HAWT has rotor angle which functions to rotate the turbine, in order to produce the aerodynamic effect to rotate the rotor, which synchronized with the generator, to produce electrical power. The rotor angle is rotating because of the forces working around it, namely the lift and drag forces [1]. The lift force makes the turbine rotating, while the drag force is the inhibitor force makes the rotating speed of the turbine decreased.…”

Section: Introductionmentioning

confidence: 99%

The Experimental investigation and Numerical Analysis on Horizontal Axis Wind Turbine with Winglet and Pitch Variations

Satwika¹,

Hantoro²,

Sarwono³

et al. 2019

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HAWT with three blades often used because it has the highest coefficient of performance among other turbines. The airfoil used is Clark-Y type because it has a high glide ratio (coefficient lift/coefficient drag) in the application of subsonic flow. The main purpose of this study is to increase the power coefficient value obtained by the increase of lift force on each airfoil of blade compiler and to fix the wind turbine performance. One of the variations added is the addition of winglets on the tip of the blade. The method employed is a laboratory scaled experiment by using wind tunnel. Theoretically, this study also applied blade element momentum (BEM) as the calculation of each segment on the airfoil, and the simulation was carried out with computational fluid dynamics (CFD), in order to find out the characteristics of flow passing by the rotor. The advantage of using winglets is, fostering the condition of starting wind turbine rotor on low tip speed ratio (TSR) condition by varying the pitch angle on the blade. The addition of pitch variation gives an advantage that it can maximize the wind speed towards the angle of attack to the airfoil; hence, it increases the aerodynamic effect on the rotor.

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“…The research work shows that the design angle of attack estimated by numerical simulations were around 2.5% lesser than the experimental techniques. Chaudhary et al [17] conducted aerodynamic analysis on NACA 63415 and NACA 63412 airfoils over a range of angles of attack at Re=1x106 using ANSYS/FLUENT software. Contrastingly, NACA 63415 displayed a better L/D ratio compared to NACA 63412 and recommended to be suitable for the design of rotor blades.…”

Section: Introductionmentioning

confidence: 99%

Geometrical Design of a Rotor Blade for a Small Scale Horizontal Axis Wind Turbine

Supreeth*¹,

Arokkiaswamy²,

Raikar³

et al. 2019

IJRTE

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In the present study, Blade Element Momentum theory (BEMT) has been implemented to heuristically design a rotor blade for a 2kW Fixed Pitch Fixed Speed (FPFS) Small Scale Horizontal Axis Wind Turbine (SSHAWT). Critical geometrical properties viz. Sectional Chord ci and Twist distribution θTi for the idealized, optimized and linearized blades are analytically determined for various operating conditions. Results obtained from BEM theory demonstrate that the average sectional chord ci and twist distribution θTi of the idealized blade are 20.42% and 14.08% more in comparison with optimized blade. Additionally, the employment of linearization technique further reduced the sectional chord ci and twist distribution θTi of the idealized blade by 17.9% and 14% respectively, thus achieving a viable blade bounded by the limits of economic and manufacturing constraints. Finally, the study also reveals that the iteratively reducing blade geometry has an influential effect on the solidity of the blade that in turn affects the performance of the wind turbine.

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Micro and small-scale HAWT blades airfoils study through CFD for low wind applications

Cited by 9 publications

References 5 publications

Investigation of the Flow Over NACA 63-415 Airfoil

Investigation of the Flow Over NACA 63-415 Airfoil

The Experimental investigation and Numerical Analysis on Horizontal Axis Wind Turbine with Winglet and Pitch Variations

Geometrical Design of a Rotor Blade for a Small Scale Horizontal Axis Wind Turbine

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