Journal ArticleDOI
Vibration based damage detection of rotor blades in a gas turbine engine
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TLDR
In this article, the authors describe the problems concerning turbine rotor blade vibration that seriously impact the structural integrity of a developmental aero gas turbine, where the blades are fabricated from nickel base super alloy through directionally solidified investment casting process.About:
This article is published in Engineering Failure Analysis.The article was published on 2014-11-01. It has received 89 citations till now. The article focuses on the topics: Turbine blade & Rotor (electric).read more
Citations
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Journal ArticleDOI
High Frequency Vibration Fatigue Behavior of Ti6Al4V Fabricated by Wire-Fed Electron Beam Additive Manufacturing Technology
Priti Wanjara,Javad Gholipour,E. Watanabe,Watanabe Kosuke,T. Sugino,P. Patnaik,Fatih Sikan,Fatih Sikan,Mathieu Brochu +8 more
TL;DR: In this paper, the vibratory fatigue behavior of Ti6Al4V deposited using wire-fed electron beam additive manufacturing (EBAM) was examined with the motivation of developing an advanced repair solution for fatigue critical cold-section parts, such as blades and vanes, in gas turbine engine applications.
Journal ArticleDOI
Microstructures and cyclic hot corrosion behavior of laser deposited Inconel 718 alloy under different heat treatment conditions
TL;DR: In this article, the hot corrosion behavior of laser deposited Inconel 718 alloy under different heat treatment conditions (solution plus aging, direct aging and as-deposited) is investigated in a salt mixture of Na2SO4 (87.5 wt.%) + NaCl (5 Wt.%), NaVO3 (7 Wt.) at 650 °C.
Journal ArticleDOI
Dynamic Responses Measured by Optical Fiber Sensor for Structural Health Monitoring
Shiuh-Chuan Her,Shin-Chieh Chung +1 more
TL;DR: An optical fiber sensing system integrating a fiber Bragg grating sensor, a long-period fiber grating optical filter and a photodetector is presented to monitor the dynamic response of a structure subjected to base excitation and impact loading.
Journal ArticleDOI
A Blade Defect Diagnosis Method by Fusing Blade Tip Timing and Tip Clearance Information.
TL;DR: A novel analysis method fusing TC and BTT signals is proposed in this paper and the classification accuracy achieves 95%, which is far higher than the traditional diagnostic method.
Journal ArticleDOI
Reconstruction of blade tip-timing signals based on the MUSIC algorithm
None Breno Christoffer Coelho Costa,Zhibo Liu,Fajie Duan,Guangyue Niu,Ye Dechao,Junnan Feng,Cheng Zhonghai,Xiao Fu,Jiajia Jiang,Jing Zhu,Meiru Liu +10 more
TL;DR: Reconstruction conditions based on the MUSIC algorithm make the traditional MUSIC method overcome spectrum aliasing without expanding the snapshot matrix, and provides a feasible solution for the spectrum methods that cannot directly extract amplitude from the pseudo spectrum, such as the improved MUSIC, SDR-MUSIC, etc.
References
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Journal ArticleDOI
High cycle fatigue in aircraft gas turbines—an industry perspective
TL;DR: The largest single cause of component failures in modern military aircraft gas turbine engines is high cycle fatigue (HCF), exceeding the number attributed to low cycle fatigue, corrosion, overstress, manufacturing processes, mechanical damage, and materials.
Journal ArticleDOI
Flutter and Resonant Vibration Characteristics of Engine Blades
TL;DR: In this article, the authors present an in-depth study of blade vibration problems that seriously impact development of advanced gas turbine configurations, and they conclude that structural integrity of power plants is the dominant factor that influences the quality, reliability, and marketability of the product.
Journal ArticleDOI
An investigation of fatigue failures of turbine blades in a gas turbine engine by mechanical analysis
TL;DR: In this article, a series of mechanical analyses were performed to identify the possible causes of the failures by examining anomalies in the mechanical behaviour of the turbine blade, and the steady-state stresses and dynamic characteristics of the blade were evaluated and synthesized in order to determine the cause of blade failures.
Journal ArticleDOI
Experimental crack propagation and failure analysis of the first stage compressor blade subjected to vibration
TL;DR: In this paper, the results of experimental vibration tests of the helicopter turbo-engine compressor blades were presented for selected undamaged blades, without existence of preliminary cracks or corrosion pits.
Journal ArticleDOI
Failure analysis of Ti6Al4V gas turbine compressor blades
TL;DR: In this article, the failure mechanism of Ti6Al4V compressor blades of an industrial gas turbine was analyzed by means of both experimental characterisations and numerical simulation techniques Several premature failures occurred in the high pressure section of the compressor due to the fracture of the blade roots.
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