HYDROFOIL FLUTTER PHENOMENON AND AIRFOIL FLUTTER THEORY. VOLUME 4. FINITE ASPECT RATIO
STEVENS INST OF TECH HOBOKEN NJ HOBOKEN United States
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Measured decay rates and flutter speeds for two-degree-of-freedom hydrofoil models with finite aspect ratio are compared with those predicted by two-dimensional airfoil theory applied in a stripwise manner. The flutter speed of one of the experimental configurations is also predicted by means of three-dimensional lifting-surface theory. Both theory and experiment indicate that flutter speed increases as aspect ratio is decreased. However, the non-conservative discrepancy found previously between measured and predicted two-degree-of-freedom flutter speeds in two-dimensional flow persists in these three-dimensional results.