Structural optimization and performance investigation of power flow adaptive flow devices based on multi-body coupling.

Through the multi-body coupling between the components in the numerical calculation, the self-adaptive yaw motion of the power flow turbine is realized. Specifically, the changes of launching dynamic performance in different yaw structure combinations (different rod length, different tail chord length, different tail limiting Angle and rotation axis position) are investigated. The results show that under the same operating conditions, the turbine efficiency of the optimized structure combination is increased by 1.05 % and the yaw speed is increased by 16.7 %. Then, the influences of different tip immersion depth and wave period on thrust coefficient and efficiency coefficient of turbine at free liquid surface are compared. The conclusion is that the turbine efficiency is increased by 0.8 % when the tip depth is 0.21D compared with that without free liquid surface. When the wave period is 1.3, the turbine efficiency is increased by 1.4 % compared with that without free liquid surface. The results show that the selection of appropriate structure combination and installation depth is of great help to turbine efficiency and yaw speed during the yaw process of turbine power flow unit. • Changing the position and limiting angle of the tail wing rotation axis can affect the yaw speed of the turbine device. • Modifying the length of the tail boom and tail chord can alter the yaw speed and efficiency of the turbine apparatus. • Different blade tip immersion depths under free liquid surface and wave periods can change the efficiency of the turbine device. [ABSTRACT FROM AUTHOR]