Accession Number:

AD0827202

Title:

A THEORETICAL STUDY OF THE FORCE AND MOMENT ON AN OSCILLATING SUPERCAVITATED HYDROFOIL NEAR A FREE SURFACE.

Descriptive Note:

Final rept. Dec 66-Nov 67,

Corporate Author:

CORNELL AERONAUTICAL LAB INC BUFFALO NY

Personal Author(s):

Report Date:

1967-11-01

Pagination or Media Count:

117.0

Abstract:

The approach assumes linearized, two-dimensional, potential flow but no further limitations are placed on the values of Froude number, cavitation number, or depth-to-chord ratio. Account is taken of the effect of gravity on both the air-water interface and the cavity surface. The report discusses the approach to the general problem which is based on a representation of the system by distributions of elemental singularities and on a double linearization procedure. The latter feature separates the problem into a quasi-steady and an unsteady part in which the governing equations of the unsteady problem depend on the solutions to the quasi-steady problem. The quasi-steady solution is obtained for a supercavitated, flat-plate foil near a free surface taking account of the effects of gravity. Results for the limiting case of steady motion are compared with other theories and with experimental data. Author

Subject Categories:

  • Marine Engineering
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE