OICC Press Mathematical Analysis and its Contemporary Applications 6 1 2024 01 01 Optimizing airfoil efficiency for offshore turbines through aerodynamic geometry enhancement 10.30495/maca.2024.2017221.1092 EN Hossein Seifi Davari Department of Mechanical and Marine Engineering, Chabahar Maritime University, Chabahar, Iran Harun Chowdhury School of Engineering, RMIT University, Melbourne, VIC 3000, Australia Mohsen Seify Davari Faculty of Engineering and Technology, Islamic Azad University, Germi, Iran Hasan Hosseinzadeh Department of Mathematics, Ardabil Branch, Islamic Azad University, Ardabil, Iran Journal Article 2024 01 01 Initially, the optimal Thickness-to-Camber ratio (t/c) of the SG6043 airfoil was examined across Reynolds numbers (Re) ranging from 10,000 to 500,000, typical for Small Wind Turbines (SWTs) using QBLADE software. The ideal t/c increased between 0.5 and 1.50, surpassing the SG6043 airfoil in peak Lift-to-Drag ratio coefficient (CL/CD). Subsequently, three modified airfoils were developed within the t/c range of 0.5 to 1.5. Results demonstrated improved aerodynamic coefficients in the modified airfoils as Re increased. Notably, Case 3 airfoil exhibited the highest maximum CL/CD of 176.97 at Re 500,000. Furthermore, Case 1 and Case 2 yielded maximum CL/CD values of 172.43 and 171.08, respectively. The airfoils in Cases 2, 1, and 3 achieved peak Lift Coefficients (CL) of 1.847, 1.82, and 1.77, respectively. Specifically, at Re except for 100,000, Case 2 airfoil outperformed the other modified and SG6043 airfoils in terms of CL. At Re ≤ 100,000, the Case 1 airfoil demonstrated a higher maximum CL/CD compared to other modified and SG6043 airfoils. Across the Re range of 10,000 to 500,000, the Case 2 airfoil consistently achieved the highest peak CL/CD. This research was validated through experimental work and compared with the EYO-Series airfoils.