An Experimental Study of Breaking Bow Waves
Abstract
Simulated breaking bow waves were generated with a two-dimensional wave maker in a tank that is 14.8 m long, 1.15 m wide, and 2.2 m deep with a water depth of 1.83 m. The wave maker spans the width of the tank at one end and its wave board has a flexible shape that simulates the passage of a ship model with a 0.91-m draft moving in the direction normal to the long side walls of the tank. The wave maker profiles at various times represent the hull profiles at various streamwise locations along the ship length. The profile histories of the breaking bow waves were measured with a photographic technique that employs a high-speed digital camera, a laser light sheet, and fluorescent dye. The images record the crest profile at the center plane of the tank where the light sheet intersects the water surface. Geometrical characteristics of the wave profiles including the height of the water contact point on the wave board and the trajectory of the plunging jet were measured as a function of the equivalent forward speed of the ship model. Measurements were performed for ship model profiles simulating a realistic ship and for ships with flat side walls at various angles of inclination to the undisturbed water surface.
- Publication:
-
APS Division of Fluid Dynamics Meeting Abstracts
- Pub Date:
- November 2004
- Bibcode:
- 2004APS..DFD.JM005S