Research Article

Aerodynamic Shape Optimization of a Vertical-Axis Wind Turbine Using Differential Evolution

Figure 8

Hybrid grids for VAWT geometry, 𝜎 = 1 . 5 (a) and 𝜎 = 0 . 4 (b).
528418.fig.008a
(a)
528418.fig.008b
(b)