Results 31 to 40 of about 15,748 (277)
Applied Sciences, 2022 This paper presents an analysis of nonsynchronous rotor blade vibrations in the last stage of an LP steam turbine at various condenser pressures. The nonlinear least squares Levenberg–Marquardt method is used in a tip-timing analysis to determine ...
Romuald Rzadkowski +4 more
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Experimental Investigation on Hardware and Triggering Effect in Tip-Timing Measurement Uncertainty
Sensors, 2023 Non-destructive testing for structural health monitoring is becoming progressively important for gas turbine manufacturers. As several techniques for diagnostics and condition-based maintenance have been developed over the years, the tip-timing approach ...
Lorenzo Capponi +4 more
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Turbocharger blade vibration: Measurement and validation through laser tip-timing [PDF]
, 2012 High Cycle Fatigue (HCF) of turbine blades is a major cause of failure in turbochargers. In order to validate changes to blades intended to reduce fatigue failure, accurate measurement of blade dynamics is necessary. Strain gauging has limitations, so an
Allport, John +11 more
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Analysis of model rotor blade pressures during parallel interaction with twin vortices [PDF]
, 2005 This paper presents and provides analysis of unsteady surface pressures measured on a model rotor blade as the blade experienced near parallel blade vortex interaction with a twin vortex system.
R. A. McD. Galbraith +5 more
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CNN-based defect diagnosis method for rotating blades
You-qi chuyun, 2020 In order to solve the problem of difficult blade defect diagnosis caused by severe signal under-sampling in tiptiming technology, a defect diagnosis method for rotating blade based on convolution neural network (CNN) was proposed.In the method, the under-
Jiwang ZHANG +3 more
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CALIBRATION OF BTT MEASUREMENT WITH RESPECT TO SENSOR POSITION OVER SHROUDED LSB
Acta Polytechnica CTU Proceedings, 2018 In order to increase efficiency and reliability of steam turbines, last stage blades are equipped with mid-span tie-boss and shroud. We can use Blade Tip-Timing method (BTT) to measure vibration of shrouded blades, but the measured level of vibration is ...
Tereza Dadáková, Zdeněk Kubín
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Capacitance Tip Timing Techniques in Gas Turbines [PDF]
, 2003 The vibration of turbomachinery blades is an important phenomenon to understand, observe and predict and is the reason for developing a tip timing measurement system.
Lawson, Craig P.
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International Journal of Rotating Machinery, 2007 Blade tip timing is a technique for the measurement of vibrations in rotating bladed assemblies. In Part I of this work a class of methods for the analysis of blade tip timing data from bladed assemblies undergoing two simultaneous synchronous resonances
J. Gallego-Garrido +3 more
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Experimental Testing of Tip-Timing Methods used for Blade Vibration Measurement in the Aero-Engine [PDF]
, 2004 An important component within the jet engine in terms of vibration and high cycle fatigue (HCF) is the blade. This is the component where continuously higher demands on weight and loading are being made.
Grant, Kelly
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BTT & RFLB - THE OPTIMUM SET FOR STEAM TURBINE BLADES MONITORING
Acta Polytechnica CTU Proceedings, 2018 BTT, Blade Tip Timing system, is a commercially available system generating files of precise times of blade tips when passing sensors attached in a machine stator.
Miroslav Balda
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