Wind Energy

268 S. Aubrun
Z/D
2.5
2
1.5
1
0.5
Fig. 49.2. The modelled wind farm
X = 3D
1.00
0.96
0.92
0.88
0.84
0.80
0.76
0.72
0.69
0.65
0.61
0.57
0.53
0.49
0.45
X = 6D
X = 9D
0
0 0.5 1 1.5 0 0.5 1 1.5 0 0.5 1 1.5
Y/D
Y/D
Y/D
Fig. 49.3. dimensionless streamwise velocity, 3D downstream of the first, the second
and the third row of discs
Z/D
2.5
2
1.5
1
0.5
X = 3D
Y/D
26
24
22
20
18
16
14
12
10
8
6
4
X = 6D
0
0 0.5 1 1.5 0 0.5 1 1.5 0 0.5 1 1.5
Y/D
X = 9D
Fig. 49.4. Streamwise turbulence intensity, 3D downstream of the first, the second
and the third row of porous discs
velocity fluctuations increase and the velocity deficit. The annular shape of
the turbulence intensity distribution is still visible after the second row. Farther
downstream, this shape is not predominant anymore. It is in agreement
with the fact that no additional velocity deficit is generated at the third row.
Y/D