International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Rotor dynamic analysis of a tidal turbine considering fluid-structure interaction under shear flow and waves

  • Lass, Andre (University of Rostock, Faculty of Mechanical Engineering and Marine Technology, Institute of Turbomachinery) ;
  • Schilling, Matti (University of Rostock, Faculty of Mechanical Engineering and Marine Technology, Institute of Turbomachinery) ;
  • Kumar, Jitendra (University of Rostock, Faculty of Mechanical Engineering and Marine Technology, Institute of Turbomachinery) ;
  • Wurm, Frank-Hendrik (University of Rostock, Faculty of Mechanical Engineering and Marine Technology, Institute of Turbomachinery)
  • Received : 2017.11.09
  • Accepted : 2018.03.17
  • Published : 2019.01.31
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Abstract

A rotor dynamic analysis is mandatory for stability and design optimization of submerged propellers and turbines. An accurate simulation requires a proper consideration of fluid-induced reaction forces. This paper presents a bi-directional coupling of a bond graph method solver and an unsteady vortex lattice method solver where the former is used to model the rotor dynamics of the power train and the latter is used to predict transient hydrodynamic forces. Due to solver coupling, determination of hydrodynamic coefficients is obsolete and added mass effects are considered automatically. Additionally, power grid and structural faults like grid fluctuations, eccentricity or failure could be investigated using the same model. In this research work a fast, time resolved dynamic simulation of the complete power train is conducted. As an example, the rotor dynamics of a tidal stream turbine is investigated under two inflow conditions: I - shear flow, II - shear flow + water waves.

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References

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