Strength Calculation and Analysis of Double-layer Turbine Blade
In order to analyze the stress of double-layer turbine blade in reversing gas turbines,double-layer turbine blade was taken as the research object,the heat transfer of blade in reverse state was ana-lyzed,and the stress calculation of double-layer turbine blade was completed based on ANSYS-Work-bench software under forward and reverse working conditions.The results show that the heat will be con-tinuously generated by friction of blade with the surrounding air in reverse state,and the stress of blade is reduced by raised temperature;after the forced cooling measures is taken to reduce temperature,the large stress position of the double-layer turbine blade is mainly located in the transition section.The optimal scheme of follow-up stiffeners and hollow reversing blade can increase the strength reserve coefficient from 1.1 to 1.65 under forward working condition,meeting the design requirements of blade strength.
reversing gas turbinedouble-layer turbine bladereverse heat transferstrength calcula-tionstructural optimization
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