..., it is found that the blades with pitch angle of 4 and 6 degrees give the highest torque, especially in a tip-speed ratio over 1. By changing the pitch angle of the blade from 0 to 6 degrees, the peak value of the power coefficients is improved by more than 30 percent. INTRODUCTION An ocean current...

... velocity. coefficient power coefficient straight-bladed vertical-axis water turbine tip-speed ratio configuration turbine flap attachment ocean energy lower surface water turbine power generation renewable energy torque coefficient experiment negative torque water tunnel gurney...