UNSTEADY HYDRODYNAMIC LOADS ON A TWO-DIMENSIONAL HYDROFOIL

Unsteady hydrodynamic lift, moment, and drag on a two-dimensional NACA 16-209 hydrofoil are determined experimentally as functions of depth of submergence, forward speed, mean angle of attack, and frequency of oscillation in pure heave and pure pitch motions. Various theoretical and experimental results are compared with the experimental steady and unsteady load coefficients on the hydrofoil model. The comparisons include both finite and zero forward speed effects. Added-mass coefficients are obtained from the zero forward speed case. Theoretical and experimental results do not agree because of limitations in both the theories and experiments. (Author)

• Corporate Authors:

  Naval Ship Research and Development Center

  Washington, DC  United States 
• Authors:
  • Pattison, J H
• Publication Date: 1970-11

Media Info

• Pagination: 150 p.

Subject/Index Terms

• TRT Terms: Coefficients; Free surface; Hydrofoils; Mass
• Old TRIS Terms: Added mass; Free surface effects; Unsteady loading
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00016683
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NSRDC-3245
• Files: TRIS
• Created Date: Aug 27 1971 12:00AM