The Correlation Between Droplet Steam Structure and Steam Turbine Blading Erosion

Abstract

A theoretical study of the correlation between droplet stream structure and steam turbine blading erosion is presented. To this end a simplified description of the motion of the individual droplet within the axial gap of a turbine stage has been used. It’s validity has been checked in an earlier paper [1]. The structure of the droplet stream has been defined by a distribution function assumed to depend, at a given gas velocity, on the droplet radius only. The family of these functions has been established by some experimental data; more knowledge in this field, however, is needed. The formulas for the mean values of some selected parameters of droplet impact have been developed, and some results of numerical calculations for two typical rotor blade profiles are discussed.