Abstract
A simultaneous optimization method for the aerodynamic design of rotor and wind-lens for wind-lens turbine has been developed. The present optimal design method is based on a genetic algorithm (GA), and optimizes simultaneously blade loading distribution and wind-lens shape. Three-dimensional Reynolds averaged Navier-Stokes (RANS) simulation for the wind-lens turbine designed by the optimal design method has been conducted on the off-designed conditions. The result shows that the wind-lens turbine designed by the optimal design method is superior to the conventional one in the total performance, because of the suppression of flow separation on the inside of wind-lens, the lower stall point, and the smaller difference between design and actual attack angles. The analysis indicates also that the more suppression of flow separation and the less difference between design and actual attack angles raise the performance of wind-lens turbines.
