NDLI: Importance of Physics-Based Prognosis for Improving Turbine Reliability: RRA 501KB Gas Turbine Blade Case Study

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ashok, K. Koul Bhanot, Saurabh Tiku, Ajay Junkin, Brent
Copyright Year	2007
Abstract	Prognosis and health monitoring (PHM) technology needs to be developed to meet the challenges posed by aging gas and steam turbines in power plants, transportation systems, gas pipelines, and other industries. It is necessary to use physics based residual life prediction and life extension techniques to take into account the state of damage due to prior service. This paper focuses on the requirements of the technology and the state of the development to date. In this study, Life Prediction Technologies Inc.’s (LPTi’s) prognosis tool known as XactLIFE™ was successfully used to establish the fracture critical location of RRA 501KB first stage gas turbine blades under steady state loads and to compute the average life to creep crack initiation in the blade airfoils. The analysis used typical engine operating data from the field in terms of engine speed and average turbine inlet temperature (TIT). The blade is known to suffer airfoil untwist and lengthening during service and this is obviously followed by stress rupture failure. The primary objectives of the case study are to show how prognosis can allow a user to predict fracture critical locations to avoid failures.
Sponsorship	Power Division
Starting Page	185
Ending Page	190
Page Count	6
File Format	PDF
ISBN	0791842738
DOI	10.1115/POWER2007-22064
e-ISBN	079183803X
Conference Proceedings	ASME 2007 Power Conference
Language	English
Publisher Date	2007-07-17
Publisher Place	San Antonio, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Temperature Blades Creep Pipelines Rupture Airfoils Fracture (materials) Steam turbines Steady state Transportation systems Physics Engines Stress Gas turbines Life extension Power stations Reliability Damage Turbines Failure
Content Type	Text
Resource Type	Article

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