Trans RINA, Vol 157, Part A3, Intl J Maritime Eng, Jul-Sep 2015 V= 2.70 m/s ; f= 0.5 Hz ; Demand α Range= ±15º
10 15
-15 -10 -5 0 5
0.2 0.4 0.6 0.8
Demand α (º) Measured α (º)
One Cycle (a)
V= 2.70 m/s ; f= 1.5 Hz ; Demand α Range= ±15º
10 15
-15 -10 -5 0 5
One Cycle (c)
V= 2.70 m/s ; f= 2.5 Hz ; Demand α Range= ±15º
10 15
-15 -10 -5 0 5
0.2 0.4 0.6 0.8
Demand α (º) Measured α (º)
One Cycle (e)
-0.8 -0.6 -0.4 -0.2 0
One Cycle (f)
Figure 19: Comparison of T-Foil angle of attack (Left) and lift coefficient (right) at frequencies of 0.5 Hz, 1.5 Hz and 2.5 Hz, water flow velocity of 2.70 m/s with demand T-Foil incidence (α) range of ±15º.
Theodorsen Experiment Quasi-Static
0.2 0.4 0.6 0.8
Demand α (º) Measured α (º)
-0.8 -0.6 -0.4 -0.2 0
One Cycle (d)
V= 2.70 m/s ; f= 2.5 Hz ; Demand α Range= ±15º
Theodorsen Experiment Quasi-Static
-0.8 -0.6 -0.4 -0.2 0
One Cycle (b)
V= 2.70 m/s ; f= 1.5 Hz ; Demand α Range= ±15º
Theodorsen Experiment Quasi-Static
V= 2.70 m/s ; f= 0.5 Hz ; Demand α Range= ±15º
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©2015: The Royals Institution of Naval Architects
A-185
α (º)
α (º)
α (º)
CL
CL
CL
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