Research of Controlled Cavitation Erosion Techniques for Underwater Steel Cutting Applications.

Abstract : A technical advance in underwater cutting equipment is needed for many ocean oriented industrial applications. DAEDALEAN ASSOCIATES, Incorporated engineers investigated the potential of a controlled cavitation erosion (CONCAVER) technique as an advancement of underwater cutting technology. The intensity of cavitation erosion is dependent upon the nozzle design, distance, velocity and application environment. Efforts have been concentrated on optimization of the parameters of design and distance in order to maximize the associated intensity of erosion. The intensity of erosion varies as the twelfth power of the nozzle velocity in the range from 750 fps to 1250 fps. The specific energy for cutting medium strength rock with the CONCAVER system surpasses the comparable energy ratings of the rotary tool and water cannon. Utilization of these abilities has enabled DAI to cut 1/2 inch thick aluminum plate at the rate of 1-1/16 inch per minute. Having advanced aluminum cutting to this point, DAI is on the threshold of cutting steel underwater. Further laboratory experimentation is required in order to characterize the CONCAVER system for field operation. (Author)