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Performance Evaluation of the ONR Axial Waterjet 2 (AxWJ-2)
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2009
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Naval ArchitectureSubsea SystemEngineeringShip DesignRocket EnginePressure VesselFluid MachinerySystems EngineeringAerodynamicsShip ResistanceMarine EngineeringPropulsionNaval EngineeringNew Design WaterjetAerospace PropulsionPump Cavitation PerformanceTest Hardware
Abstract : Testing of a new design waterjet, the ONR Axial Flow Waterjet 2, was performed in the 36-Inch Variable Pressure Water Tunnel at the Naval Surface Warfare Center, Carderock Division. These tests measured the pump powering performance and the pump cavitation performance. The test hardware, methodology, and results are presented here, along with comparisons to computational predictions. The test results are used to make predictions of the performance of four 9-foot diameter pumps installed in a notional 970 foot long JHSS, Joint High Speed Sealift, hullform with a maximum available power of 36 MW at each pump. The results are also used to predict the performance of the same ship using smaller 7.4-foot diameter pumps. A method is also presented for making full-scale powering predictions using more detailed information from tow tank tests than is generally available.