Experimental Forces and Free-Surface Elevations for a Yawed Surface-Piercing Plate.
Abstract
A yawed surface-piercing plate of aspect ratio 0.787 was towed in water at a high Froude number. It is shown that the flow near the plate is similar to a class of flows near moving ship bows and that the free-surface elevation may be expressed as a high Froude number expansion with the initial term independent of speed. Measured values of side force, yaw moment, and roll moment indicate that slender body theory accurately predicts the forces and moments induced by an angle of attack for the conditions tested. This is confirmed by experimental free-surface contours measured by stereographic photogrammetry. The experimental elevations generally conform to a theoretical prediction which superimposes the contribution of angle of attack calculated from slender body theory with the effect of thickness calculated from thin ship theory. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1977
- Accession Number
- ADA036045
Entities
People
- R. B. Chapman