Numerical and Experimental Investigation of Aspect Ratio on Aerodynamic Performance of NACA 4415 Airfoil Section at Low Reynolds Number

Ayaz Ümütlü H. C., Kıral Z., Karadeniz Z. H.

STROJNISKI VESTNIK/JOURNAL OF MECHANICAL ENGINEERING, cilt.71, sa.1-2, ss.51-57, 2025 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 71 Sayı: 1-2
  • Basım Tarihi: 2025
  • Doi Numarası: 10.5545/sv-jme.2024.1155
  • Dergi Adı: STROJNISKI VESTNIK/JOURNAL OF MECHANICAL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.51-57
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In this study, the effect of aspect ratio on the aerodynamic coefficients is investigated for a NACA 4415 airfoil profile. Four different aspect ratios which are 3, 5, 7, and 9 are evaluated with the CFD simulations and the experiments. The CFD studies are performed using a 3D computational domain and by using the k-ω SST turbulence model for turbulence calculations. The measurements of the aerodynamic forces are carried out using open jet type wind tunnel. CFD and experimental studies are performed at angles of attack from 0° to 25° and Reynolds number 85e3. The results show that as the aspect ratio increases, separation points move towards the leading edge of the airfoil and the stall angle reduces. Furthermore, it is observed that the lift coefficients increase with the increasing aspect ratio. It is seen that the CFD solutions and the experimental data are in good agreement according to obtained results.