Design Optimization of Subcavitating Hydrofoils for America's Cup Class Yachts

Prof. Joaquim R. R. A. Martins

Slide at 21:02

without much penalty in drag
1.50
1.25
1.00
opt-h40 (5 - 5°) opt-h40 (5 = - 2p5')
opt-h40 (8=0°)
0.75
opt-h40 (5 = 2p5°) opt-h40 (5=5°)
opt-h40 (5 = 7p5°)
0.50
G^=05
opt-h40 (8 = 10°)
q*=0.37
opt-h40 (5 = 12p5*)
0.25
q*=0.26
opt-h40 (S 5=15°)
9*=0.19
9°=0.18
baseline
0 = 0 13
0.00
-0.25
0.000
0.005
0.010
0.015
0.020
0.025
0.030

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Summary (AI generated)

In a subsequent study, we examined various flap sizes. While we did not vary the sizes continuously due to the complexity of mesh generation, we conducted several quick assessments. The findings indicate that under high lift conditions, larger flaps provide significant benefits. However, this advantage comes with trade-offs related to hinging moments, actuation, and other engineering factors beyond aerodynamics.