2 results listed
In this numerical study, flow control over NACA 0018
with bumpy surface at low Reynolds number was investigated.
Solutions were performed at angle of attack 10° and Reynolds
number of 60.000 and 80.000. Results demonstrated that at
Reynolds number of 60.000 the bubble burst took place over the
base airfoil whereas flow over the bumpy reattached the surface
except a small laminar separation bubble. At Reynolds number
of 80.000, a small laminar separation bubble formed over the
base airfoil and this bubble got smaller over the bumpy airfoil.
1.st International Conference Energy Systems Engineering
ıcese'17
İlyas Karasu
H. Demir
Kemal Koca
Mustafa Özden
M.S. Genç
Özkan Ramazan
Nowadays, the ratio of the wind energy is increasing
over time in terms of energy requirement. Therefore, a lot of
studies have been conducted to improve the performance of wind
turbines with different designs for wind turbines. Analyzes of the
blade designs are investigated by using numerical programs. In
this study, the length of support rods in a vertical axis wind
turbine was changed and investigated numerically how the
length of the support rods affected the moment coefficient. The
blade profile used in the vertical axis wind turbine is NACA 4412
and the number of blades is 3. 120 rpm angular velocity is
defined for the turbine and input velocity is 7 m/s in x-direction.
According to the results, it was seen that the moment coefficient
was the highest when the length of the support rods was 0.4 m.
Moreover, there was no linear relationship with between the
length of the support point and the aerodynamic performance of
the turbine.
1.st International Conference Energy Systems Engineering
ıcese'17
M.S. Genç
H. Demir
Özkan Ramazan
H.Hacı Açıkel
Burak Karakaya