Power Coefficient Analysis of Double-blade Half-rotating Impeller Tidal Turbine Operating at Yaw

The double-blade half-rotating impeller tidal turbine (DHITT) is a new type of vertical shaft current with lift and resistance performance. power coefficient the DHITT affected by flow direction. In order to research ( C P ) under different direction, optimal attack angle half-impeller was explored, fluctuation operating at yaw analyzed based on angle. unsteady simulated overlapping grid technique, turbine’s directions analyzed, which verified experiments. results have demonstrated that 0.53. As greater than 30º, reduction nearly 40%, but average efficiency loss only 3.7% in range -3º 3º.