Numerical Simulation of Energy Capture Efficiency of a Vertical Axis Turbine Under Complex Sea Conditions

Abstract

AbstractThe motion state of a floating platform and turbine in a flow field is analyzed by using seakeeping theory. Without considering the floating platform, the energy capture efficiency of the turbine in the flow field is compared by obtaining the hydrodynamic performance of the turbine impeller flow field at different velocities and tip speed ratios. Through processing and analyzing the complex sea conditions' data, the selected working sea conditions and extreme sea conditions for calculation are combined with the environmental load data to simulate and measure the energy capture efficiency variation of turbines subjected to single-degree-of-freedom fluctuations (pitch or surge). It has important reference value to subsequent research of the turbine working in complex sea conditions, multi-flow-field coupling calculation, and structural improvement design.