Aerodynamic Damping
Aerodynamic Damping
Aerodynamic Damping
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Variable speed turbines<br />
damping per blade element<br />
T' [N]<br />
300<br />
200<br />
T' = 220.5*dVd + 0.05 100<br />
0<br />
-1.5 -1 -0.5 0 0.5 1 1.5<br />
-100<br />
-200<br />
-300<br />
dVd [m/s]<br />
T' [N]<br />
800<br />
600<br />
400<br />
T' = 326.5*dVd - 0.06<br />
200<br />
0<br />
-2 -1 0<br />
-200<br />
1 2<br />
-400<br />
-600<br />
-800<br />
dVd [m/s]<br />
V = 12 m/s<br />
V = 23 m/s<br />
Van der Tempel’s method useful, but time consuming
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