Abstract
The aerodynamic modelling of the wind turbine blades is a vital step in the design of the turbine. Several design methods are available for the aerodynamic design of the rotor, however, in this study a mathematical model based on blade element momentum concept is applied. the purpose of this work is to optimize the distribution of chord and twist angle along the blade span of a 20 KW HAWT using the BEM method, the blade design parameters such as the optimum lift and drag coefficient , chord and twist angle, the axial induction factor(a) and the angular induction factor(a’) of the designed HAWT are codified and estimated using the MATLAB software. The results of the analysis show on the one hand a decrease in chord length and twist angle along the blade length and on the other hand the maximum values that can be achieved by the axial and angular inductions factors are respectively 0.3325 and 0.175. This approach can be effectively implemented for the analysis of HAWTs operating at different characteristics of the designed blade.
Highlights
The increasing concerns with environmental and economic issues are driving the search for more durable electrical sources
Wind turbines come in a variety of shapes and sizes, they can be mainly classified into horizontal axis wind turbine (HAWT) and vertical axis wind turbine (VAWT)
Several studies and investigations have been performed over the years to design and improve the airfoil performance for wind turbine blades
Summary
The increasing concerns with environmental and economic issues are driving the search for more durable electrical sources. [1] According to experience the major characteristics of wind turbine performance are based on the aerodynamic forces generated by the mean wind.[2] the design of an aerogenerator is essentially based on aerodynamic modelling, the dimensioning of this geometrical form has a high impact on its energy efficiency and, as a result on its economic profitability. The notion of a tip loss was introduced by Prandtl’s to simplify the wake of the turbine by modelling the helical vortex wake pattern as vortex sheets generated by the mean flow but having no direct impact on the wake itself.[6] In this project our study was focused on modelling and designing of an HAWT with known blade shape and airfoil characteristics using BEM theory, the blade geometry parameters that include Prandtl’s tip loss correction are calculated with the aid of MATLAB. Results and discussion have been discussed and the last section covers the conclusion
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
