Some Applications of Photoelasticity in Turbine-Generator Design

Abstract

Abstract This paper deals with three particular problems in turbine-generator design, namely (a) stress concentrations in transverse grooves of two-pole generator rotors, (b) centrifugal stresses in rotors, and (c) stress concentrations in T-heads (bolts and blade fastenings). The connection between these problems is only their mutual sphere of application and the fact that in each case the solution has been obtained by photoelasticity. The problems have been investigated as two-dimensional ones, the first and third being analyzed by the standard photoelastic technique, while in the second problem the fundamentally three-dimensional method of “freezing” the stresses in bakelite samples was applied.