Paper Title:
New Fatigue Model for Service Life Assessment of Last Stage Blade in Steam Turbine Based on Liquid Corrosion and Dynamic Stress
  Abstract

Forced vibration and liquid corrosion are important reasons for last stage blade failure in steam turbine. In order to improve reliability of blades in wet steam stages, the dynamic stress and the liquid-solid impact stress of blade were analyzed firstly, then Neuber’s rule, rainflow counting method and improved cumulative damage rule were introduced to develop a new model to evaluate service life of last stage blade. Many factors such as manufacturing quality, metal quality and operation status were considered, so it is more reasonable for service life assessment of last stage blade. At last, the service life of a last stage blade of 680mm was analyzed and the result approximates the practical service life. It is shown the new fatigue model can give some significant data and is usable for engineering application.

  Info
Periodical
Key Engineering Materials (Volumes 348-349)
Edited by
J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel
Pages
613-616
DOI
10.4028/www.scientific.net/KEM.348-349.613
Citation
Y. H. Xie, D. Zhang, Z. P. Feng, "New Fatigue Model for Service Life Assessment of Last Stage Blade in Steam Turbine Based on Liquid Corrosion and Dynamic Stress ", Key Engineering Materials, Vols. 348-349, pp. 613-616, 2007
Online since
September 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jang Hyun Lee, Kyung Ho Lee, Kyung Su Kim
Abstract:The turbine wheels of a turbocharger are operated at high revolution speed in high temperature inlet gas. Alloy 713LC blades of the turbine...
1063
Authors: E. McCulloch, Alan MacBeath, Margaret Lucas
Abstract:The performance of an ultrasonic cutting device critically relies on the interaction of the cutting tool and the material to be cut. A...
519
Authors: Jaromír Janoušek, Josef Strejcius, Stanislav Hřeben
Chapter 1: Materials and Structures in Mechanical Engineering
Abstract:The paper deals with a problem of stress crack initialization on surface of low pressure steam turbine blade during operational regime. The...
185