Waterjet Propulsion

Waterjets are now accepted as a proven technology, particularly for high speed craft and they are increasing their penetration into small craft, leisure, workboat, patrol and military markets. Today, waterjets are becoming the preferred propulsion choice where high efficiency, enhanced maneuverability; shallow draft capability and low maintenance are key requirements. Continuing developments now include very large units of 30MW capacity and the use of waterjets for high speed boost propulsion. As the technology matures, designers need better tools to help predict the performance and efficiency of these systems across a wide range of operating conditions. Computational fluid dynamics is an increasingly powerful tool which has become almost universal, but traditional model testing and trials measurements are still required to confirm critical results. Designers and manufacturers also continue to seek to reduce noise, wake and wash as well as optimize the strength and weight of the various mechanical components and to improve reliability, reduce installation time and maintenance.

Source: Marinetalk News, May 26, 2008