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J. Mar. Sci. Eng. 2018, 6(2), 71;

Numerical Simulation and Uncertainty Analysis of an Axial-Flow Waterjet Pump

State Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China
Marine Design and Research Institute of China (MARIC), Shanghai 200011, China
Author to whom correspondence should be addressed.
Received: 30 March 2018 / Revised: 1 June 2018 / Accepted: 5 June 2018 / Published: 11 June 2018
(This article belongs to the Special Issue Marine Propulsors)
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Unsteady Reynolds-averaged Navier–Stokes simulations of an axial-flow pump for waterjet propulsion are carried out at model scale, and the numerical uncertainties are analyzed mainly according to the procedure recommended by the twenty-eighth International Towing Tank Conference. The two-layer realizable k-ε model is adopted for turbulence closure, and the flow in viscous sub-layer is resolved. The governing equations are discretized with second-order schemes in space and first-order scheme in time and solved by the semi-implicit method for pressure-linked equations. The computational domain is discretized into block-structured hexahedral cells. For an axial-flow pump consisting of a seven-bladed rotor and a nine-bladed stator, the uncertainty analysis is conducted by using three sets of successively refined grids and time steps. In terms of the head and power over a range of flow rates, it is verified that the simulation uncertainty is less than 4.3%, and the validation is successfully achieved at an uncertainty level of 4.4% except for the lowest flow rate. Besides this, the simulated flow features around rotor blade tips and between the stator and rotor blade rows are investigated. View Full-Text
Keywords: waterjet propulsion; axial-flow pump; unsteady; RANS; uncertainty analysis; tip clearance flow waterjet propulsion; axial-flow pump; unsteady; RANS; uncertainty analysis; tip clearance flow

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Qiu, J.-T.; Yang, C.-J.; Dong, X.-Q.; Wang, Z.-L.; Li, W.; Noblesse, F. Numerical Simulation and Uncertainty Analysis of an Axial-Flow Waterjet Pump. J. Mar. Sci. Eng. 2018, 6, 71.

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