Supercavitating hydrofoils with wetted upper sides
Abstract
This paper aims to give the characteristics of a supercavitating hydrofoil with a wetted upper side and a rounded leading edge placed in a shallow tunnel with a rapid flow running through it. The method used is a perturbation method expanded in relation to a single small parameter characterising at one and the same time the thickness of the foil, its incidence and the depression of the cavity. The use of a single small parameter leads to a consistent formulation making it possible, if required, to take the gravity effects into account, assuming the flow to be supercritical. The cavity wake is considered by introducing a displacement surface with a set pressure condition on its boundaries. Apart from the closed contour formed by the foil, its cavity and the displacement surface, the flow is assumed to be irrotational and the fluid inviscid. The calculations have been developed only in the case of free gravity fluid. The extension to the case of fluid with gravity will be set out in another paper. The foil used for the calculations has been the subject of a certain number of tests which are described in the second part of the present study.
- Publication:
-
Journal de Mecanique
- Pub Date:
- 1980
- Bibcode:
- 1980JMec...19..249R
- Keywords:
-
- Cavitation Flow;
- Computational Fluid Dynamics;
- Free Boundaries;
- Hydrofoils;
- Three Dimensional Flow;
- Aerodynamic Drag;
- Boundary Value Problems;
- Flow Geometry;
- Gravitational Effects;
- Leading Edges;
- Pressure Distribution;
- Two Dimensional Flow;
- Wetting;
- Fluid Mechanics and Heat Transfer