Design and Stability Analysis of an Offshore Floating Multi-Turbine Platform

摘要

The technology of multi-turbine platform design is currently in development which can accommodate multiple turbines on a single platform that results in a reduction of installation and mooring costs. This paper presents a method to analyze the effects of the wake between the wind turbines on a multi-turbine platform and use it to find a suitable distance for spacing the wind turbines on the platform. Jensen wake model, Larsen wake model, and CFD simulations are used for calculating the wake effects. The actuator disk theory is used for modeling the rotor. The RANS equations with the k – ω SST turbulence model are used for CFD calculations. Based on the results of wake effects the spacing requirements for the wind turbines are calculated and the design of the platform is carried out. Hydrostatic analysis of the modeled platform is done to study the floating stability behavior of the platform. The first order hydrodynamics and wave loadings on the platform are calculated in the frequency domain using the potential flow linear diffraction model. The hydrodynamic analysis is carried out on the platform to predict the wave-body interaction between the platform and the waves.