Results 51 to 60 of about 1,027,849 (126)

New blade tip-timing system for measuring rotor blade vibration of steam and gas turbines [PDF]

E3S Web of Conferences, 2019
One of the crucial issues regarding turbine maintenance is registering blade vibrations. These vibrations can cause serious damage to the engine. Turbine blade vibrations were measured during nominal speed as well as during run up and run down.
Kowaleczko Piotr, Rządkowski Romuald, Kubitz Leszek, Troka Paweł, Kowaleczko Paweł, Szczepanik Ryszard   +5 more
doaj   +1 more source

Blade Tip Timing Technique: Theoretical Principles and Simulation of an Experimental Test

, 2015
The Blade Tip Timing (BTT) is a technique that measures the vibration amplitude and frequency of the blades of bladed disks by using a set of probes. The objective of the thesis is to compare the accuracy of the different methods proposed in literature ...
Giovanni Rigosi (7985789)
core   +6 more sources

Iteratively Learning Reconstruction of Blade Tip-Timing Signals and Cointegration-Based Damage Detection Under Variable Conditions

IEEE Access
Blade tip-timing (BTT) is a direct blade vibration monitoring technique and how to use under-sampled BTT signals for blade damage detection is still challenging under variable conditions. Compressed sensing (CS) has been introduced for reconstructing BTT
Zhongsheng Chen, Haopeng Liu, Lianying Liao   +2 more
doaj   +1 more source

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, M.L. Jupp, P. Olley, Jupp, Martyn, A.J. Day, A. Pezouvanis, J.M. Allport, B. Mason, Institution of Mechanical Engineers, G.W. Janicki, M.K. Ebrahimi, A.I. Pierończyk   +11 more
core   +1 more source

Non-contact identification of rotating blade vibration

Mechanical Engineering Journal, 2015
This paper presents a non-contact measurement and diagnostic method for the parametric identification of vibrations of rotating engine blades, based on blade tip-timing (BTT) measured by optical sensors.
Peng WANG, Donald KARG, Zhaoyan FAN, Robert X. GAO, Karrin KWOLEK, Andrew CONSIGLIO   +5 more
doaj   +1 more source

Vibration Parameters Estimation by Blade Tip-Timing in Mistuned Bladed Disks in Presence of Close Resonances

Applied Sciences, 2020
The present paper is focused on the post processing of the data coming from the Blade Tip-Timing (BTT) sensors in the case where two very close peaks are present in the frequency response of the vibrating system.
Saeed Bornassi, Christian Maria Firrone, Teresa Maria Berruti   +2 more
doaj   +1 more source

Study on identification of modal parameters of turbomachinery blade and impeller

Nihon Kikai Gakkai ronbunshu, 2020
To develop turbomachinery blades with high reliability, it is indispensable to verify the natural frequency, the damping, the resonant stress, etc. under operating condition, and utilize these data in the mechanical design of a new blade.
Yasutomo KANEKO, Kazushi MORI, Tatsuya FURUKAWA   +2 more
doaj   +1 more source

Blade Tip-timing Technology with Multiple Reference Phases for Online Monitoring of High-speed Blades under Variable-speed Operation

Measurement Science Review, 2018
High-speed blades form core mechanical components in turbomachines. Research concerning online monitoring of operating states of such blades has drawn increased attention in recent years.
Ji-wang Zhang, Lai-bin Zhang, Ke-Qin Ding, Li-xiang Duan   +3 more
doaj   +1 more source

23rd Congress of the European Hematology Association Stockholm, Sweden, June 14‐17, 2018

, 2018
HemaSphere, Volume 2, Issue S1, Page 1-1113, June 2018.
wiley   +1 more source

Development of a Simulation Model for Blade Tip Timing with Uncertainties

Aerospace
Blades are widely used in the engines of aerospace vehicles, fans of near-space aerostat, and other equipment, and they are the key to completing energy conversion and pressure adjustment of the capsule.
Kang Chen, Guoning Xu, Xulong Zhang, Wei Qu   +3 more
doaj   +1 more source