Analytical Prediction of Pressures and Forces on a Ship Hull Due to Cavitating Propellers.
Abstract
An existing technique for determining free space pressures generated by a cavitating propeller operating in a ship wake is used as the basic input for determining the pressure distribution on various ship sections. The procedure involves establishing a boundary value problem on the ship section and the free surface, with appropriate conformal mapping operations that allow conversion of the problem to a more simplified boundary, viz. a flat plate and its adjacent free surface which represents the boundary for the lower half-plane. The integral equation for solution of this problem to determine the pressure is established and solved analytically, with evaluation carried out by means of digital computation in terms of the various physical parameters and those obtained from the mapping procedure. The solution provides the pressure distribution at different sections on the hull, from which the total forces are then determined via integration with this strip theory approach. In addition the effects of different mode shapes of hull vibration are incorporated in order to obtain generalized forces for determining hull vibration responses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADA121238
Entities
People
- James Bentson
- Moshe Benatar
- Paul Kaplan