Page 46 - Steam Turbines Design, Applications, and Rerating

Introduction 27

An example of a structured turbine is presented in Fig. 1.21. Since
variations within the industrial market make it impossible to struc-
ture groups of stages to cover every conceivable application, the pri-
mary challenge for this steam path structure is generally to create a
matrix of nozzles, buckets, wheels, and casing pattern sections on a
component basis, each with predefined interface points.
In this manner, it is possible for major manufacturers to offer the
demonstrated experience of standard components together with the
flexibility required for a wide range of industrial applications.