Abstract
Investigation on the Vertical Axis Marine Current Turbine has been previously carried out from different points of view. Maitre, et al., (2012) investigated a Darrieus cross flow marine turbine with a two-dimensional RANS code. The influence of the near wall grid density on the numerical results was discussed. Castelli, et al. (2012)1 INTRODUCTIONMarine Current Turbines (MCTs) convert the kinetic energy of the tidal waves into useful energy forms. Two common types of MCTs are Horizontal Axis and Vertical Axis Marine Current Turbines. The principle of operation of both these types is the same as for Horizontal Axis and Vertical Axis Wind Turbines (HAWT) and (VAWT). The use of Darrieus type Vertical Axis Marine Current Turbines (VAMCTs) provides several advantages over Horizontal Axis Marine Current Turbines (HAMCTs) such as the low starting torque, quite operation and insensitivity to the angle of incident flow. Hence, VAMCTs are better suited to extract power from tidal energy. One commonly used tidal turbine is the Darrieus rotor, originally patented as wind turbine in the USA in 1931 by G.J.M. Darrieus, (Castelli, et al., 2012).
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