Numerical investigation of rib structure effects on performance of wind turbines

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Tanurun H. E., Akin A., ACIR A.

JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI, cilt.24, sa.3, ss.1219-1226, 2021 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.2339/politeknik.845804
  • Dergi Adı: JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.1219-1226
  • Anahtar Kelimeler: NACA-0012, triangular rib structure, aerodynamic performance, CFD, OPTIMIZATION
  • Gazi Üniversitesi Adresli: Evet

Özet

In order to achieve high aerodynamic performance in wind, airfoil profile geometries have significant effect. In this study, NACA 2412 airfoil which is widely used for wind turbines was investigated numerically. Technical drawings were drawn by sing CAD program RHINOCEROS and flow analysis was performed by using ANSYS FLUENT. In our study, Reynolds number was 3,24x10(5) and k-epsilon realizable was chosen as turbulence model solver. Chord length is 0,25 m and spanwise is 5. Airfoil models were investigated in terms of lift (C-L) and drag (C-D) coefficient while free stream air velocity is 20 m/s. Smooth blade profile reached its maximum lift coefficient at 22,5 degrees on the other hand modified profile reached its maximum value of lift coefficient at 25 degrees angle of attack. K-1 airfoil profile has reached its maximum value as 1,1462 and this value is %1 more than K-0's value. It was observed that K-1 profile's average C-L / C-D is %5 more than K-0's average value after stall. Triangular rib structure contributes positively on aerodynamic performance during high angle of attack.