2.3.5   Lacing wires


The long blades of the LP cylinder are stiffened towards the tip with lacing wires. Their purpose is to damp vibrations and raise the resonant frequency of the blade so that it does not coincide with any exciting frequency present in the turbine. The presence of these wires, however, produces losses in blade efficiency because of the passage area that they block.

<<- Previous entry                  Table of contents             Next entry ->>