Environmental Engineering Reference
In-Depth Information
1.4
N
F
=
850 [min
-1
]
V=
11 [m/s]
N
R
=
-640 [min
-1
]
Z
F
=3 Z
R
=5
M1
1.2
M3
1.0
M1
0.8
0.6
M2
0.4
0.2
M3
0.0
0.4
M2
0.2
M1
0.0
-0.2
Tip of
rear rotor
Tip of
front rotor
M3
-0.4
0
0.2
0.4
0.6
0.8
1
1.2
R
Figure 23: Flow around the tandem wind rotors composed of two-dimensional
blades.
50
f
Fin
f
Fout
40
f
F
by eq. (1)
30
Z
F
= 3
20
10
V =
8 m/s
N
F
=
400 min
-1
0
0
0.2
0.4
0.6
0.8
1
R
Figure 24 : Relative fl ow angles measured from the tangential direction.
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