Numerical simulation of the effects of passive flow control techniques on hydrodynamic performance improvement of the hydrofoil

Efficient hydrofoil design is a massive challenge for the current turbine blade designers. Flow separation on the suction side of the hydrofoil reduces the hydrodynamic performance of the current turbine. In this paper, the combined effects of dimple with vortex generators and dimple with tubes on S1210 hydrofoil is numerically studied and compared with baseline hydrofoil. The lift coefficient values increased at a higher angle of attack, and the stall angle is delayed from 10 degrees to 12 degrees. Maximum glide ratio increments are 132% and 144% at an angle of attack of 12 degrees for outward dimple with tubes and outward dimple with vortex generators respectively. The findings will be helpful to design a stronger blade profile for the current turbine.