Nowadays, in order to accommodate electrical grids that include fluctuating supplies of green energy, more and more fossil power plants are increasingly required to start up and shut down frequently. The increased number of stress cycles leads to a significant reduction of lifetime. In this paper, numerous load cycles of steam turbine casing including various start up and shut down conditions were numerically investigated by using the finite element analysis (FEA). The total strain throughout the cycles was directly calculated by the elastic-plastic material model. The delta equivalent total strain was determined by rainflow count method, and the assessment of lifetime was evaluated.
- International Gas Turbine Institute
Lifetime Assessment of Steam Turbine Casing
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Hu, Y, Jiang, P, Ye, X, Chen, G, Zhang, J, Hao, Z, & Xiao, L. "Lifetime Assessment of Steam Turbine Casing." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines. Montreal, Quebec, Canada. June 15–19, 2015. V008T26A032. ASME. https://doi.org/10.1115/GT2015-43495
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