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http://dx.doi.org/10.5293/KFMA.2005.8.6.047

Unsteady Fluid Forces Acting on a Pitching Foil  

Yang, C.J. (한국해양대학교 연구원)
Publication Information
The KSFM Journal of Fluid Machinery / v.8, no.6, 2005 , pp. 47-54 More about this Journal
Abstract
An oscillating foil can produce a driving force through the generation of a reversed $K\ vortex street, and it can be expected to be a new highly effective propulsion system. A simple pitching foil model was made and it was operated within a water channel. The wake formation behind a pitching foil was visualized and unsteady fluid forces were measured using a 6-axis force sensor based on force and moment detectors. We have been examined various conditions such as reduced frequency, amplitude and pivot point in NACA 0010. The results showed that thrust coefficients increased with a reduced frequency. We also presented the experimental results on the characteristics of a pitching foil at various parameters.
Keywords
Pitching foil; Reduced frequency; 6-axis force senor; Thrust; Hysterisis; Dye visualization; Reverse $K\ vortex street;
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