Numerical Simulation and Uncertainty Analysis of an Axial-Flow Waterjet Pump
AbstractUnsteady 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
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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.
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. Journal of Marine Science and Engineering. 2018; 6(2):71.Chicago/Turabian Style
Qiu, Ji-Tao; Yang, Chen-Jun; Dong, Xiao-Qian; Wang, Zong-Long; Li, Wei; Noblesse, Francis. 2018. "Numerical Simulation and Uncertainty Analysis of an Axial-Flow Waterjet Pump." J. Mar. Sci. Eng. 6, no. 2: 71.
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