Research Article
Shape Optimization of an Airfoil in Ground Effect for Application to WIG Craft
Table 2
Lift to drag ratio (L/D) for original and optimized NACA 4412 airfoil in ground effect for various heights above the ground.
| | / | L/D of original airfoil | L/D of airfoil optimized
for / = 0.2 | L/D of airfoil optimized
in free stream without ground effect |
| | 0.2 | 88.32 | 99.96 | 92.56 | | 0.4 | 79.01 | 88.13 | 84.50 | | 0.6 | 75.28 | 83.87 | 81.21 | | 0.8 | 73.35 | 81.71 | 79.50 |
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