The prediction of creep life for turbine blade relies on simulated blade temperature and stress data. However,simulations often simplify the entire turbine disk to a single blade,leading to inaccurate results. In order to investigate the validity of simplified single-blade models and enhance the accuracy of blade creep life prediction,a study on the creep life of turbine blades based on full-scale simulation method was conducted. First,full-scale simulation method for the turbine disk and a simplified single-blade model were established. Then,the blade temperature and maximum principal stress were calculated using the hybrid thermal-fluid-solid coupling method. Finally,the comprehensive equation of thermal strength parameters was employed to predict the creep life of the blade. The results indicate that the relative error in temperature between the single-blade model and the full-scale model does not exceed 2%; the relative error in maximum principal stress between the two is within 8%; however,the relative error in prediction of creep life between them reaches as high as 712.93%. The single-blade model predicts lower temperatures and maximum principal stresses,resulting in a significantly overestimated creep life. These findings demonstrate the necessity of employing a full-scale model to analyze the creep life of turbine blades and lay a foundation for the accurate prediction of their creep life.
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