ABSTRACT
Wateijet propulsion system is widely used to thrust high speed marine vessels in excess of 30-35 knots by virtue of high propulsive efficiency, good maneuverability, and less vibration. Since 7-9% of the total power is approximately lost in intake duct due to flow separation, nonuniformity, etc., detail understanding of flow phenomena occurring within intake duct is essential to reduce the power loss. The present work solved 3-D incompressible RANS equations on multiblocked grid system of the flush type intake duct of wateijet. The numerical results of pressure distributions, velocity vectors, and streamlines were compared with experiments and good agreements were obtained for three jet velocity ratios.
