Environmental Engineering Reference
In-Depth Information
Fig. 4.3 a Lift coefficient of
the SG6040 (bottom) and
SG6043 aerofoils. b Drag
coefficient of the SG6040
(bottom) and SG6043
aerofoils. c Lift:Drag ratio of
the SG6040 (bottom) and
SG6043 aerofoils. The latter
is shifted upwards by 1 unit.
The legend gives the
Reynolds number
(a)
2.5
2
1.5
1
10
5
1.5x10
5
2x10
5
2.5x10
5
3x10
5
5x10
5
0.5
0
-0.5
-10
-5
0
5
10
15
angle of attack (
°
)
(b)
0.2
0.2
0.18
0.18
0.16
0.16
0.14
0.14
0.12
0.12
0.1
0.1
0.08
0.08
0.06
0.06
0.04
0.04
0.02
0.02
0
0
-10
-10
-5
-5
0
0
5
5
10
10
15
15
angle of attack (
°
)
(c)
300
10
5
1.5x10
5
2x10
5
2.5x10
5
3x10
5
5x10
5
250
200
150
100
50
0
-50
-10
-5
0
5
10
15
angle of attack (
°
)
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