| Abstract |
All modern hydro-kinetic turbines are being designed based on a lift, using airfoils, which should have a significant lift to drag ratio to achieve maximum efficiency.SG604X family airfoil has significant lift-to-drag ratio under an operating range of Re from 10(5)-10(6), which also come under our working conditions. Blade Element Momentum (BEM) theory was used to obtain optimum blade shape. The iterative numerical approach was used in MATLAB to calculate optimized blade profile and coefficient of performance (C-p). After grid independency test, finally k-omega shear stress transport (SST) and the k-epsilon model with enhanced wall treatment were used for calculation of the lift coefficient and the drag coefficient of airfoil SG6043. The performance of the rotor overall expected tip speed ratio (T.S.R (lambda)) was calculated and found that maximum C-p,C-max is 0.51 at optimum lambda(opt) of 5. The suitability of SG6043 airfoil over NACA0012 airfoil in our case has been shown. (C) 2019 Published by Elsevier Ltd. |
