Abstarct: Two different downwind pre-aligned bent and coned rotor concepts have been investigated in this thesis. To reduce the mass-scaling issues associated with conventional upwind rotors of extreme-scale turbines, a downwind bent rotor concept is considered that uses coning and curvature to align the non-circumferential loads for a given steady-state condition. This alignment can be pre-set to eliminate downwind blade moments for a given steady-state condition near rated wind speed and to minimize them for other conditions. In the present study, two different blade geometries of 112.7 m length baxsed on SANDIA 100m baxseline wind turbine have been designed, modeled, and simulated. Then a structured grid and an unstructured one have been applied to these geometries using ICEM CFD and Ansysmeshing. SST k-ω and AnsysFluent have been used for the CFD simulation of flow around the turbines proposed herein. The simulation results revealed that the bent rotor concept may increase the performance coefficient by 13% compared to the root-coned blade. The error percentage is reported to be less than 3%. Furthermore, vorticities behind the turbine rotor have also been obtained perfectly and graphically represented, which could be useful for wake simulations in wind farm analyses. Moreover performance paramteres of the proposed turbine such as performance coefficient, wind turbine blade torque, and thrust force have showed good accordance with similar previous studies.