Refining Airfoil Designs: Tailored Modifications for Enhanced Performance in Low Reynolds Number Conditions

In the current study, three airfoils—PSU۹۴-۰۹۷, SD۶۰۶۰, and S۲۰۵۵—were analyzed for their aerodynamic performance across Reynolds numbers (Re) ranging from ۵۰,۰۰۰ to ۵۰۰,۰۰۰, typical for Small Wind Turbine (SWT) blade airfoils. Results indicated that as Re increased, the aerodynamic efficiency of all modified airfoils improved. Optimal thickness-to-camber ratios (t/c) of ۱.۵۰-۲.۲۵, ۲.۲۵-۳, and ۰.۶۰-۱.۵۰ for SD۶۰۶۰, S۲۰۵۵, and PSU۹۴-۰۹۷ airfoils, respectively, contributed to enhanced efficiency. PSU۹۴-۰۹۷-modified airfoil demonstrated the highest lift-to-drag ratio (CL/CD) of ۱۵۱.۶۰ at Re of ۵۰۰,۰۰۰. Peak CL/CD values for SD۶۰۶۰-modified and S۲۰۵۵-modified airfoils were ۱۰۹.۸۷ and ۹۷.۱۳, respectively. PSU۹۴-۰۹۷-modified, SD۶۰۶۰-modified, and S۲۰۵۵-modified airfoils attained peak lift coefficients (CL) of ۱.۵۳۴, ۱.۲۱۹, and ۱.۱۷۴, respectively. PSU۹۴-۰۹۷-modified airfoil also showed the highest peak CL across Re ranging from ۵۰,۰۰۰ to ۵۰۰,۰۰۰. Percentage increase in peak CL/CD across Re range of ۵۰,۰۰۰ to ۵۰۰,۰۰۰ was ۱۵.۸%, ۱۶.۰۸%, ۲۴.۴۳%, ۱۷.۱۲%, ۱۷.۳۰%, ۱۷.۹۸%, and ۲۰.۲۲% for PSU۹۴-۰۹۷-modified airfoil; ۲۷.۸۷%, ۲.۰۳%, ۱۳.۷۷%, ۱۵.۸۳%, ۱۵.۱۴%, ۱۷.۹۵%, and ۱۷.۷۳% for SD۶۰۶۰-modified airfoil; and ۱۶.۷۰%, ۷.۱۱%, ۵.۷۷%, ۷.۲۵%, ۱۱.۴۰%, ۹.۹۹%, and ۶.۰۴% for S۲۰۵۵-modified airfoil. In addition to enhancing the aerodynamic efficiency of airfoils and consequently increasing electricity production in wind turbines, optimizing the t/c reduces the material needed for wind turbine construction. This not only lowers the cost but also minimizes environmental impact by using fewer resources. Thus, these modifications are environmentally beneficial, contributing to sustainable development alongside improving wind turbine efficiency.

کلیدواژه ها:

Lift ، Optimization ، Reynolds Numbers ، Turbine ، Wind