Strength considerations for concept design of turbine blade

Based on the importance of overall parameters for the subsequent detailed design, the potential problems of the strength in the concept design phase was investigated, then the effects of design parameters, such as AN², wheel speed, solidity of blade and performance of the materials, on strength and life were studied. The results show that the values of AN² for the advanced turbofan aero-engine are within 25 m²·(r/min)², the wheel speed is related to disc shape factor which must be designed with 2, the solidity must be designed to satisfy the strength of the fir-tree, and stress at the root of the blade must be defined within 250 MPa to avoid failure from LCF(low cycle fatigue) and creep. These results would be useful for the turbine blade design of advanced aircraft engines and gas turbines.