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RESEARCH PAPERS

Multistage Turbine Erosion

[+] Author and Article Information
M. Menguturk, M. Erten

Mechanical Engineering Department, Bogazici University, Istanbul, Turkey

D. Gunes

Civil Engineering Department, Bogazici University, Istanbul, Turkey

E. F. Sverdrup

Westinghouse Research and Development, Pittsburgh, PA

J. Turbomach 108(2), 290-297 (Oct 01, 1986) (8 pages) doi:10.1115/1.3262050 History: Received October 18, 1985; Online November 09, 2009

Abstract

This paper presents a computer package developed to calculate the blade erosion rates in multistage turbines that use particle-laden hot expansion gases. This package is an extension of the single-stage erosion code presented in some of our earlier papers. The present package calculates gas flow and particle trajectories in each stage. The calculated particle outlet conditions of a given stage are processed statistically to generate the particle inlet conditions to the next stage enabling trajectory and erosion calculations to be advanced beyond a single turbine stage. The package allows erosion predictions to be obtained either based on the semi-empirical erosion formula presented earlier or by using an improved model which relies upon direct interpolation of available experimental data. This computer package has been applied to a four-stage electric utility gas turbine. It has been found that, in addition to the first-stage rotor blades, as indicated by our earlier studies, the second-stage rotor and the second and third-stage stator blades may also be exposed to critical erosion damage.

Copyright © 1986 by ASME
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