Fatigue Life of Turbine Final Blade Under Different Loads
With the introduction of policies such as carbon peaking and carbon neutrality,hydropower,wind power and photovoltaic power generation have developed rapidly.However,due to the influence of climate,the power generation of new energy generation is unstable,which requires the coordination of thermal power plants to adjust the power generation,resulting in deep peak adjustment operation of thermal power units.However,depth peak-regulating operation has a great influence on unit operation,and the operation environment of final stage blades becomes more complex.In particular,the change of final stage flow field has a great influence on blade life.In order to study the influence of changes in the final stage flow field caused by deep peak-regulating operation on the fatigue life of the final stage blades of a steam turbine,this paper takes the final stage blades at the top of 50%blades of the low pressure cylinder of a thermal power unit as the research object,and adopts the numerical simulation method for turbine operation under different working conditions.The fatigue life of the final stage blade of the low pressure cylinder of the steam turbine was studied and compared under three working conditions of 100%THA,50%THA and 20%THA respectively.It is concluded that the fatigue life of turbine blades decreases with the reduction of turbine load.
万方数据
维普
