Wind Energy Potential Prediction and Investigation of Aerodynamic Effects of Surface Dimples over the surface of Wind Turbine Blade
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Abstract
Wind energy is one of the fastest growing sectors in Renewable Energy. Wind turbine is a device that transduce kinetic energy from the atmosphere (wind) into electrical energy. The main purpose of this study is to present and perform an investigation on the wind energy potential of an area named WETER (9.2220 latitude, 41.7900 longitude), Horizontal Axis Wind Turbine (HAWT) blade design and investigation of the aerodynamic effect of surface dimples over the wind turbine blades.
Wind data collected from Diredawa Metrological station and satellite’s wind data over a period of ten years of the region were used in order to figure out the wind energy potential of the site. Analytical result of the potential assessment is used as an input for blade design. Among the different methods of blade design, Blade Element Momentum (BEM) theory is used to optimize the chord and twist distributions of the blades. National Renewable Energy Laboratory’s (NREL) S830 wind turbine airfoil is selected for the blade design. The aerodynamic performance of the designed blade is examined using Computational Fluid Dynamic (CFD) analysis; Due to its ability to capture flow separation and accuracy, Large Eddy Simulation (LES) transient turbulence model is preferred and implemented using ANSYS-FLUENT.A number of dimple configuration were added on both pressure and suction side of the blade surface and their corresponding effect on the aerodynamic performance is studied.
Experimental investigation on scaled down S830 model is carried out using a sub-sonic wind tunnel for validation. 3D printing technology was used to manufacture two HAWT airfoils with dimple and without dimple. The result of these studies reveals that the intended site have a tremendous wind energy potential to install a wind farm with a mean annual wind power density ranging from 458.96 W/m2 to 663.63 W/m2 and with prevailing wind direction of South-East-South (SES). The designed blade have a rated power output of 0.5MW with a power extraction coefficient (Cp) of 0.41, while the numerical and experimental study result of dimpled wind turbine shows some dimple arrangement will enhance the aerodynamic performance by delaying flow separation. The computational result illustrate dimpled HAWT blade have 6.78% increment in Energy capturing efficiency.
Wind Energy Is One Of The Fastest Growing Sectors In Renewable Energy. Wind Turbine Is A Device That Transduce Kinetic Energy From The Atmosphere (Wind) Into Electrical Energy. The Main Purpose Of This Study Is To Present And Perform An Investigation On The Wind Energy Potential Of An Area Named Weter (9.2220 Latitude, 41.7900 Longitude), Horizontal Axis Wind Turbine (Hawt) Blade Design And Investigation Of The Aerodynamic Effect Of Surface Dimples Over The Wind Turbine Blades. Wind Data Collected From Diredawa Metrological Station And Satellite?�?S Wind Data Over A Period Of Ten Years Of The Region Were Used In Order To Figure Out The Wind Energy Potential Of The Site. Analytical Result Of The Potential Assessment Is Used As An Input For Blade Design. Among The Different Methods Of Blade Design, Blade Element Momentum (Bem) Theory Is Used To Optimize The Chord And Twist Distributions Of The Blades. National Renewable Energy Laboratory?�?S (Nrel) S830 Wind Turbine Airfoil Is Selected For The Blade Design. The Aerodynamic Performance Of The Designed Blade Is Examined Using Computational Fluid Dynamic (Cfd) Analysis; Due To Its Ability To Capture Flow Separation And Accuracy, Large Eddy Simulation (Les) Transient Turbulence Model Is Preferred And Implemented Using Ansys-Fluent.A Number Of Dimple Configuration Were Added On Both Pressure And Suction Side Of The Blade Surface And Their Corresponding Effect On The Aerodynamic Performance Is Studied.? Experimental Investigation On Scaled Down S830 Model Is Carried Out Using A Sub-Sonic Wind Tunnel For Validation. 3d Printing Technology Was Used To Manufacture Two Hawt Airfoils With Dimple And Without Dimple. The Result Of These Studies Reveals That The Intended Site Have A Tremendous Wind Energy Potential To Install A Wind Farm With A Mean Annual Wind Power Density Ranging From 458.96 W/M2 To 663.63 W/M2 And With Prevailing Wind Direction Of South-East-South (Ses). The Designed Blade Have A Rated Power Output Of 0.5mw With A Power Extraction Coefficient (Cp) Of 0.41, While The Numerical And Experimental Study Result Of Dimpled Wind Turbine Shows Some Dimple Arrangement Will Enhance The Aerodynamic Performance By Delaying Flow Separation. The Computational Result Illustrate Dimpled Hawt Blade Have 6.78% Increment In Energy Capturing Efficiency.
Wind Energy Is One Of The Fastest Growing Sectors In Renewable Energy. Wind Turbine Is A Device That Transduce Kinetic Energy From The Atmosphere (Wind) Into Electrical Energy. The Main Purpose Of This Study Is To Present And Perform An Investigation On The Wind Energy Potential Of An Area Named Weter (9.2220 Latitude, 41.7900 Longitude), Horizontal Axis Wind Turbine (Hawt) Blade Design And Investigation Of The Aerodynamic Effect Of Surface Dimples Over The Wind Turbine Blades. Wind Data Collected From Diredawa Metrological Station And Satellite?�?S Wind Data Over A Period Of Ten Years Of The Region Were Used In Order To Figure Out The Wind Energy Potential Of The Site. Analytical Result Of The Potential Assessment Is Used As An Input For Blade Design. Among The Different Methods Of Blade Design, Blade Element Momentum (Bem) Theory Is Used To Optimize The Chord And Twist Distributions Of The Blades. National Renewable Energy Laboratory?�?S (Nrel) S830 Wind Turbine Airfoil Is Selected For The Blade Design. The Aerodynamic Performance Of The Designed Blade Is Examined Using Computational Fluid Dynamic (Cfd) Analysis; Due To Its Ability To Capture Flow Separation And Accuracy, Large Eddy Simulation (Les) Transient Turbulence Model Is Preferred And Implemented Using Ansys-Fluent.A Number Of Dimple Configuration Were Added On Both Pressure And Suction Side Of The Blade Surface And Their Corresponding Effect On The Aerodynamic Performance Is Studied.? Experimental Investigation On Scaled Down S830 Model Is Carried Out Using A Sub-Sonic Wind Tunnel For Validation. 3d Printing Technology Was Used To Manufacture Two Hawt Airfoils With Dimple And Without Dimple. The Result Of These Studies Reveals That The Intended Site Have A Tremendous Wind Energy Potential To Install A Wind Farm With A Mean Annual Wind Power Density Ranging From 458.96 W/M2 To 663.63 W/M2 And With Prevailing Wind Direction Of South-East-South (Ses). The Designed Blade Have A Rated Power Output Of 0.5mw With A Power Extraction Coefficient (Cp) Of 0.41, While The Numerical And Experimental Study Result Of Dimpled Wind Turbine Shows Some Dimple Arrangement Will Enhance The Aerodynamic Performance By Delaying Flow Separation. The Computational Result Illustrate Dimpled Hawt Blade Have 6.78% Increment In Energy Capturing Efficiency.