Vibration failure in admission pipe of a steam turbine due to flow instability

被引：8

作者：

Sierra-Espinosa, F. Z. ^{[1
]}

Garcia, J. C. ^{[1
]}

机构：

[1] Univ Autonoma Estado Morelos, CIICAp, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62209, Morelos, Mexico

来源：

ENGINEERING FAILURE ANALYSIS | 2013年 / 27卷

关键词：

Vibration analysis; Steam turbine; CFD; Turbulence modeling;

D O I：

10.1016/j.engfailanal.2012.08.011

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

High vibrations in admission piping of a steam turbine were analyzed. Vibration failure was detected after piping modification as part of upgrading a 300 MW power turbine plant searching for 10% power increment. However, after I year operation a vibration malfunction was detected in control valve and fittings of income piping with risk of cracking for maximum output. A study of computational fluid dynamics (CFD) revealed large steam flow instabilities produced by recirculation and high velocity exceeding a critical point. Measurements of natural frequency piping system with the turbine stall and subsequent measurements of frequency and vibration analysis during turbine operation indicated that recirculating flow plays a main role in the vibration problem by resonance. The paper discusses CFD results obtained with a proposed pipe configuration that reduces turbulence effects. Combined pressure slide and diameter increment in piping lead to reduced vibration turbine operation. Published by Elsevier Ltd.

引用

页码：30 / 40

页数：11

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