Wind Energy

36 J. Fernández Puga et al.
measurement (Table 6.1). Both models perform well calculating mean velocity
values but differ remarkably regarding turbulence values. Best agreement
is achieved performing a large-eddy simulation. The profiles for the mean velocity
and the turbulent kinetic energy fit very well to the measured profiles
z/H
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
measurements
LES−SL
k−ε RNG
k−ω SST
0
−0.4 −0.2 0 0.2 0.4
U/U∞
0.6 0.8 1 1.2
Fig. 6.4. Longitudinal mean velocity in the lee of the hill ( x
W =0.5)
z/H
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
measurements
LES−SL
k−ε RNG
k−ω SST
0
−0.1 −0.08 −0.06 −0.04 −0.02 0 0.02 0.04 0.06 0.08 0.1
k/(3/2U∞ 2
)
Fig. 6.5. Turbulent kinetic energy in the lee of the hill ( x
W =0.5)