Differential expansion in steam turbines refers to varying temperatures and subsequent size changes in turbine components during operation. Causes include steam inlet fluctuations and uneven heat distribution. Uncontrolled expansion leads to stress, reduced efficiency, and safety risks. Mitigation involves material selection, precise design, and thermal insulation. Monitoring with temperature sensors and regular maintenance are vital. Advanced techniques like finite element analysis and active cooling systems offer additional control. Understanding and managing differential expansion ensures safe and efficient steam turbine performance.
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