In this study an effort has been made to estimate the effects of the transient thermal in the turbine rotor using Finite Element Analysis. A typical turbine rotor is considered for transient thermal analysis using the modeling software i.e. CAD software and ANSYS software. The turbine rotor of a steam turbine is subjected to temperature variations in short periods of time due to the start and stop cycles of the turbine. This causes sudden changes in the temperature with transient thermal stresses being induced into the turbine rotor. The transient effects are due to the changes in the material properties like - Density, Specific heat and Youngs Modulus. The estimate of the thermal stresses induced in the turbine rotor due to change in temperature is important . The rotor material is 30Cr and the properties of the material are updated to the model. The appropriate boundary conditions depicting the actual environment in which the turbine rotor works in steam turbine are also updated. The thermal stresses due to large temperature gradients are higher than the steady state stresses. The large thermal stresses occur before reaching the steady state value.
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