Numerical Simulation of a Vertical Axis Crossflow Helical Hydrokinetic Turbine

Abstract

With a growing need for energy and a growing need to decrease dependence on fossil fuel energy production, new methods of energy generation are required. The energy that exists in flowing rivers, ocean currents and various other artificial water channels is considered a viable option of renewable power. These types of systems are still in the infant stages of development as the main focus of renewable energy in recent years has been solar and wind energy harvesting. Recently there has been an increase in research and implementation of vertical axis crossflow hydrokinetic turbines globally. The research data, in conjunction with the ducting system, may be used to extrapolate power capacity for a farm configuration. The research incorporates computational fluid dynamic (CFD) models and supporting numerical modelling to validate the simulation. The simulations were compared to experimental work conducted in the literature. Methodology from previous researchers Kirke (2011) and Khan et al. (2009) was used in the understanding of the turbine system. Methods from Shino et al. (2002) and Sheldahl and Klimas (1981) were used as a basis for the modelling of the turbine. The developed model can effectively predict the hydrodynamic performance of a vertical-axis marine current turbine.