Accession Number : AD0717953

Title :   Unsteady Hydrodynamic Loads on a Two-Dimensional Hydrofoil.

Descriptive Note : Final rept.,

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER WASHINGTON D C

Personal Author(s) : Pattison,John H.

Report Date : NOV 1970

Pagination or Media Count : 150

Abstract : 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)

Descriptors :   (*HYDROFOILS, *LOADS(FORCES)), HYDRODYNAMICS, HYDROFOIL CRAFT, LIFT, MOMENTS, DRAG, ANGLE OF ATTACK, OSCILLATION, PITCH(MOTION), STATISTICAL DATA

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE