Simulations of Intracycle Angular Velocity Control for a Crossflow Turbine

Straight-bladed crossflow turbines are computationally explored for harvesting energy in wind and water currents. One challenge is the transient occurrence of high apparent angles attack on blades that reduces efficiency due to flow separation. This paper explores kinematic manipulation angle through intracycle control angular velocity. Using an unsteady Reynolds-averaged Navier–Stokes model at moderate Reynolds numbers, kinematics associated physics confined unconfined configurations. The computations demonstrate increase turbine up 54%, very closely matching benefits shown by previous experiments. Simulations display time evolution velocity relative blade, which modified with sinusoidal such peak torque generation aligns With optimal a there minimal separation during power generation; however, large trailing edge vortex shed as decreases. configuration has more prominent susceptible number, resulting 41% under same conditions flow.