... at the University of Virginia is greatly appreciated. 12 09 2010 22 09 2011 23 02 2012 23 02 2012 compressors gas turbines machine bearings rotors vibration measurement Rotordynamic instability is a self-excited vibration phenomenon which can result due to aerodynamic...

... vibration measurement Gas turbine designers are well aware that blade mistuning intensifies the risks of high cycle fatigue in aircraft engines—a problem which is reported to incur costs of around $400 million each year ( 1 ), or around 30% of all jet engine maintenance costs ( 2 ). From...

... combustion combustion equipment flames flow visualisation gas turbines jets measurement by laser beam pulsatile flow thermoacoustics turbulence vibration measurement The well-known industrial problem that motivates this work is the limitation on performance of power and propulsion gas...

... accelerometers combustion diesel engines mountings power transmission (mechanical) torque torque control torsion velocity measurement vibration measurement Most engine control systems nowadays are torque based, meaning that ignition, injection, and all the control parameters are set...

... compounds pressure sensors structural acoustics temperature distribution vibration measurement vibrations combustion acoustics vibrations acoustoelastic interaction vibroacoustics Air pollution has become an important issue in the past few decades. An important component...

... transforms vibration measurement rotors Two different wavelet analysis settings were performed on the vibration signal obtained from the steady-state operating condition. These results were then displayed on different graphs known as the global wavelet map and local wavelet map. Global wavelet map...

..., 2003, Paper No. 2003-GT-38659. Manuscript received by IGTI, October 2002, final revision, March 2003. Associate Editor: H. R. Simmons. 16 June 2003 01 October 2002 01 March 2003 15 04 2005 rotors condition monitoring fatigue cracks vibration measurement crack...

... namely 90% of shaft speed. Similar behavior was found to be exhibited by casing vibration measurement signals, with the difference that this measurement was not found to be that sensitive to changes of small magnitude disturbances, caused by rotating stall. Changes due to surge are noticeable...

... the use of trial weights, if a rotor model is available. A procedure is developed in this paper to balance flexible rotors using complex modes and complex vibration measurements. It is shown that a complex rotor model is essential for the success of the technique. Moreover, careful calibration...

..., Amsterdam, The Netherlands, June 3–6, 2002; Paper No. 2002-GT-30420. Manuscript received by IGTI, Dec. 2001, final revision, Mar. 2002. Associate Editor: E. Benvenuti. 03 June 2002 01 Dec 2001 01 Mar 2002 07 06 2004 turbogenerators vibration measurement parameter estimation...

... time-variant systems. Among the future aspects of this ongoing research work is to improve magnetic actuator performance aiming at also achieving a better control performance. 01 10 2003 01 03 2004 electromagnetic actuators shafts rotors blades vibration control vibration...

... GT03. GT02’s frequencies, derived from vibration measurements, were quite different however and trends in damping not so clear. It is thought that the reason for this is the distortion of the acoustic resonance by the presence of a local mechanical resonance with a similar, fixed frequency...

... identifying frequency or engine order using a small number of probes. This paper presents a new analysis method for identifying synchronous resonance engine order using two tip-timing vibration measurements. The measurements are made at different locations on the turbomachinery casing using a minimum of two...