The purpose of this research was to investigate the power and thrust coefficients of a horizontal axis tidal stream
turbine (HATST) with different blade geometries, including twist angles, blade numbers, and section profiles.
The RANS equations and Star-CCM+ commercial software were used to numerically analyze these variables.
Furthermore, the turbulence model used in this study is a Realisable k-ε turbulent model. Nine different models
were defined by changing the twist angle, thickness, camber, and blade numbers. The results are presented, and
the power and thrust coefficients are compared against TSR for each of the nine different models. The pressure
distribution and flow velocity contour are also presented and discussed.