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J. Mar. Sci. Eng. 2018, 6(2), 53; https://doi.org/10.3390/jmse6020053

Marine Turbine Hydrodynamics by a Boundary Element Method with Viscous Flow Correction

CNR-INSEAN, National Research Council, Marine Technology Research Institute, Via di Vallerano 139, 00128 Rome, Italy
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Received: 30 March 2018 / Revised: 27 April 2018 / Accepted: 1 May 2018 / Published: 8 May 2018
(This article belongs to the Special Issue Marine Propulsors)

Abstract

A computational methodology for the hydrodynamic analysis of horizontal axis marine current turbines is presented. The approach is based on a boundary integral equation method for inviscid flows originally developed for marine propellers and adapted here to describe the flow features that characterize hydrokinetic turbines. For this purpose, semi-analytical trailing wake and viscous flow correction models are introduced. A validation study is performed by comparing hydrodynamic performance predictions with two experimental test cases and with results from other numerical models in the literature. The capability of the proposed methodology to correctly describe turbine thrust and power over a wide range of operating conditions is discussed. Viscosity effects associated to blade flow separation and stall are taken into account and predicted thrust and power are comparable with results of blade element methods that are largely used in the design of marine current turbines. The accuracy of numerical predictions tends to reduce in cases where turbine blades operate in off-design conditions. View Full-Text
Keywords: marine current turbine; hydrodynamics; boundary element methods; trailing wake models; viscous flow correction marine current turbine; hydrodynamics; boundary element methods; trailing wake models; viscous flow correction
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Salvatore, F.; Sarichloo, Z.; Calcagni, D. Marine Turbine Hydrodynamics by a Boundary Element Method with Viscous Flow Correction. J. Mar. Sci. Eng. 2018, 6, 53.

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