Elimination Of Flow-Induced Instability From Steam Turbine Control Valves.

  title={Elimination Of Flow-Induced Instability From Steam Turbine Control Valves.},
  author={James R. Hardin and Frank Kushner and S. Koester},
This paper describes two steam turbine governor valve failures in the same installation, the troubleshooting that determined the root cause, and the new valve designed to prevent similar failures. The original governor valve design had been used successfully for many years in large multistage, multivalve steam turbines, but apparently was not reliable at the high steam pressures employed today. Mechanical analyses, flow analyses, and testing showed that the failures were caused by flow-induced… 

Experimental study of steam turbine control valves

Abstract Because of the converging-diverging configuration of the valve passage, venturi valves have been widely used in large turbines to regulate inlet flow as turbine governing valves for about

Flow-Induced Steam Valve Vibrations—A Literature Review of Excitation Mechanisms, Preventive Measures, and Design Improvements

Steam turbine inlet valves are used to control the power output of steam turbines for power generation. These valves may be subject to vibration under certain operating conditions, especially in

Numerical Analysis of the Unsteady Loads on a Steam Turbine Double Seat Control Valve

The continuously growing request for high operational flexibility also for large scale steam turbine creates new challenges for control valve design. Such components, subjected to large static loads,

Introduction of a novel test rig for the investigation of fluid-structure interaction effects in steam turbine control valves using an elastic model

In recent years, steam turbines experience increasing quantities of load changes along with extended part load operation, posing new challenges for the regulation of the turbines. Control valves are

Analysis of the Unsteady Flow Field in a Steam Turbine Control Valve using Spectral Proper Orthogonal Decomposition

The application of the SPOD method on a critical operating point with a temporal excitation of pressure oscillations observed in the experiments with dry air is presented and the dominating flow phenomena were isolated and flow structures visualized.

Flow-induced vibration and noise in control valve

Control valves are used as flow regulators for steam turbines, which operate under wide ranges of valve openings and pressure ratios. The inherent throttling action and complex 3D flow in control

Unsteady behavior of wall-detached flow inside a steam turbine control valve

  • Sihua Xu
  • Engineering, Physics
    Physics of Fluids
  • 2019
Wall-detached flow inside an ultra-supercritical steam turbine control valve was comprehensively investigated with detached-eddy simulation, proper orthogonal decomposition (POD), and flow

A computational fluid dynamics (CFD) analysis of fluid excitations on the spindle in a high-pressure valve



Steam Turbine Control Valve Noise

Although noise problems with steam turbine control valves have existed before, they have become more prominent with nuclear turbines, whose valves range to 20 in. in diameter. Our first‐generation

Turbine Remanufacture - One Option For Reliability And Efficiency Improvement.

A case study of a remanufacture of a steam turbine is presented. The turbine has been in service for 20 years . Thermal and physical stresses have taken their toll on the turbine casing and

Universal features of weight functions for cracks in mode I

Universal features of elastic notch-tip stress fields

Mechanical Vibrations

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DEN HARTOG'S book combines mathematical simplicity with a rare insight into the physical nature of vibrations, and its author has a happy knack of explaining things in a way that the less gifted can

Fluid-Induced Vibration of Steam Control Valves,

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A Rub in a High Speed Steam Turbine,

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Effects of Stress Ratio and Step Loading on Fatigue Crack Propagation Rate,

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