What is commonly done to accommodate axial expansion in large steam turbines?

In large steam turbines, accommodating axial expansion is crucial to prevent damage and ensure smooth operation. Mounting the turbine on dovetail guides is a method that allows for the necessary movement caused by thermal expansion. These guides are designed to permit linear motion along the axis of the turbine while maintaining stability and alignment under operational conditions.

As the temperature of the turbine increases during operation, the components expand. Dovetail guides provide a mechanism that enables this expansion to occur seamlessly, preventing undue stress and possible misalignment of the turbine components. This approach is particularly effective for large turbines where significant thermal expansion can occur.

While other options might contribute to managing mechanical stresses in different contexts, the specific function of dovetail guides directly addresses the axial expansion challenge faced by large steam turbines.