Results 201 to 210 of about 4,542 (246)

An OPR-free Blade Tip Timing Method Based on Blade Spacing Change

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2020
Compressor blades often operate in high temper-ature, high pressure, and heavy load environments. They are in direct contact with the outside air, which causes their life to be severely limited. Blade vibration is an important factor that reflecting the state of the blade. Therefore, effective blade vibration monitoring methods are needed.
Zengkun Wang, Zhibo Yang 0001, Shuming Wu, Haoqi Li, Ruqiang Yan 0001, Shaohua Tian, Xingwu Zhang, Xuefeng Chen 0002   +7 more
openaire   +1 more source

Blade tip timing and strain gauge correlation on compressor blades

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2008
Traditionally, rotor blade vibration response measurements have been made using strain gauges. Rolls-Royce has a long experience of using strain gauge measurements to certify blades. In recent years, however, much effort has been invested in developing blade tip timing (BTT).
D Knappett, J Garcia
openaire   +1 more source

Synchronous Blade Vibration Analysis Using Blade Tip Timing Method

2021
In this study, the analysis method of synchronous vibration in turbine blades is developed. Blade tip timing (BTT) data measured by non-contact sensors is analyzed by the proposed method. The time of arrivals (TOA) of each blade when it passes the sensors are converted to the blade tip displacements in real time.
Y. Oh, H. H. Yoo, Y. Kim
openaire   +1 more source

Blade Fissure Determination by Means of Blade Tip-Timing System

Volume 7A: Structures and Dynamics, 2018
Since the turbomachinery came into existence there is control issue of rotor blade stress condition and blade health monitoring both aero engines in service and in process of impeller machines refinement. This issue relevance is to rotor blade failure lead to serious damage of compressor and aero engines in whole.
Victor Mileshin, Victor Fateev, Alexander Stepanov   +2 more
openaire   +1 more source

Pre-Emptive Rotor Blade Damage Identification by Blade Tip Timing Method

ASME 2013 Gas Turbine India Conference, 2013
The Blade Tip Timing (BTT) method uses the differential arrival timings of the blades at case-mounted sensors to effectively characterize the vibrations of all blades in a rotor. This paper studies the use of the BTT method for preemptive prediction of rotor blade damage; through a careful monitoring of blade natural frequencies in conjunction with the
Siddhartha S. Guru, S. Shylaja, Sunil Kumar, Ramesh Murthy   +3 more
openaire   +1 more source

Blade tip timing for multi-mode identification based on the blade vibration velocity

Mechanical Systems and Signal Processing
Xuefeng Chen, Baijie Qiao
exaly   +2 more sources

A Hybrid Fault Diagnosis Approach for Blade Crack Detection using Blade Tip Timing

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2020
The harsh working environment of the compressor hinders the condition monitoring of rotating blades. Blade faults are mostly induced by foreign object damage or high cycle failure due to initial defects. Detecting these failures before blades being broken will not only ensure engine safety but largely reduce repair costs.
Shuming Wu, Zengkun Wang, Haoqi Li, Zhibo Yang 0001, Shaohua Tian, Ruqiang Yan 0001, Shibin Wang, Xuefeng Chen 0002   +7 more
openaire   +1 more source

Blade tip timing (BTT) uncertainties

AIP Conference Proceedings, 2016
Blade Tip Timing (BTT) is an alternative technique for characterising blade vibration in which non-contact timing probes (e.g. capacitance or optical probes), typically mounted on the engine casing (figure 1), and are used to measure the time at which a blade passes each probe.
openaire   +1 more source

BLADE-TIP TIMING MEASUREMENT OF SYNCHRONOUS VIBRATIONS OF ROTATING BLADED ASSEMBLIES

Mechanical Systems and Signal Processing, 2002
Blade-tip timing (BTT) is a promising method for the detection, measurement and analysis of blade vibrations in rotating bladed assemblies. However, the intricacies of the method when applied to real rotating structures undergoing synchronous (Engine Ordered) vibrations are not yet fully understood.
G. DIMITRIADIS, I.B. CARRINGTON, J.R. WRIGHT, J.E. COOPER   +3 more
openaire   +1 more source

Analysis of blade vibration frequencies from blade tip timing data

SPIE Proceedings, 2010
Blade tip timing is a non-intrusive technique used for detection, measurement and analysis of blade vibration in rotating blade assemblies. The main recent focus in the application of blade tip timing system has been the determination of blade vibration frequencies.
Menglin Li, Fajie Duan, Tao Ouyang
openaire   +1 more source