This research aims to modify the structure of wind turbine blades by transitioning from the original single-layer design to a double-layer configuration. The alteration involves generating a wake effect when the wind flows over the first layer of blades, causing a deviation in the airflow behind the blades. Adjusting the second layer of blades based on this airflow deviation area is expected to significantly enhance power generation efficiency. According to experimental results, the wake behind the blades causes an airflow deviation angle of approximately 15 degrees. Therefore, when the two layers of blades in the turbine are positioned at the theoretically optimum phase angle, subtracting the 15-degree wake deviation angle yields the configuration for maximum power generation efficiency. The turbine designed based on these findings, despite having the same number of blades as a single-layer turbine, can improve power generation efficiency by about 40%. Additionally, literature suggests that blade costs constitute approximately 14% of the overall generator cost. By adopting the approach presented in this study, an estimated 18% cost reduction is anticipated. Overall, this research design not only enhances wind energy generation efficiency but also effectively reduces costs, showcasing significant potential for the future.