Measurements were made of the length of the leading edge separation
bubble for sharp-edged profiles of finite span submerged below a free
surface. These hydrofoils were tested under a fully-wetted flow condition.
Flow visualization techniques were used to determine the separation region
primarily as a function of velocity, chord length, profile shape, aspect
ratio, and angle of attack. The bubble length increased with increasing
angle of attack and aspect ratio. An increase in the wedge angle for wedged
shaped profiles required an increase in angle of attack to attain the same
bubble length. Variation of the chord length and leading-edge thickness
had little effect on the ratio of bubble to chord length.
Wetzel, Joseph M.; Foerster, K. E..
Measurements of the Leading-Edge Separation Bubble for Sharp-Edged Hydrofoil Profiles.
ST. ANTHONY FALLS HYDRAULIC LABORATORY.
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