... discs (structures) fly ash gas turbines Navier-Stokes equations temperature distribution The continuous demand on performance improvement in gas turbine engines requires the engine components to be designed for higher combustor exit temperatures. Current advanced gas turbine engines operate...

... disk assembly with a blisk. aerospace engines blades compressors design engineering discs (structures) friction vibrations 10 12 2009 09 11 2010 19 07 2011 19 07 2011 To illustrate this argument, additional mistuning is added to 100 randomly mistuned, 24...

... tools may supply a preliminary quantitative description of all relevant physical phenomena, those set in a wheel space region. computational fluid dynamics confined flow design engineering discs (structures) drag engines flow simulation friction gas turbines heat transfer rotational...

... at midaxial plane (Fourier solution, reconstructed): Direct solution of ( a ) 14 harmonics and ( b ) 10 harmonics 14 07 2009 04 08 2009 25 10 2010 25 10 2010 cavitation discs (structures) flow instability Fourier analysis heat transfer rotors vortices...

... the experimental data at the rotor exit shows the greatest unsteadiness within the rotor hub passage with the first endwall design. 20 07 2009 21 07 2009 21 10 2010 21 10 2010 blades design engineering discs (structures) jets rotors sealing materials stators turbines vortices...

... series expansion can be used to efficiently compute eigenvalues and eigenvectors of a mistuned system. Numerical examples are presented to corroborate the validity of theoretical analysis. 23 01 2008 09 01 2009 29 04 2010 29 04 2010 blades discs (structures) eigenvalues...

... fluid dynamics cooling discs (structures) gas turbines maximum entropy methods rotational flow rotors thermodynamics vortices rotating cavity buoyancy far-from-equilibrium thermodynamics self-organizing systems maximum entropy production Figure 1 shows a simplified diagram...

... and generally more unsteady flow field at the rotor exit near the hub. The injection causes the turbine efficiency to deteriorate by about 0.6%. 20 08 2008 29 08 2008 21 01 2010 21 01 2010 cavitation cooling discs (structures) flow instability gas turbines rotors seals...

... where the stiffness perturbation dominates. 20 08 2008 03 09 2008 02 07 2009 aerodynamics blades computational fluid dynamics damping discs (structures) turbomachinery The vast majority of turbomachinery blade mistuning studies have been conducted using only...

... for an academic rotor are presented to establish the validity of the technique. 22 07 2007 22 02 2008 08 04 2009 blades discs (structures) geometry reduced order systems rotors vibrations Mistuning refers to inevitable variations in blades’ properties, which arise during...

... to blade mistuning, which can be characterized by the higher percentage of blades on the total blisk strain energy. 29 01 2007 15 08 2008 02 04 2009 aerospace engines blades discs (structures) fatigue rotors vibrations blisk mistuning mode localization blade vibration...

... for axial gap seals and the experiments showed a reasonable agreement for both close- and wide-spaced stages. 30 03 2007 24 08 2007 22 01 2009 aerospace engines blades cadmium cavitation confined flow cooling discs (structures) flow simulation gas turbines numerical analysis...

... and ( b ) blade-by-blade damping breakdown, − 4 ND mode, lightly damped, ABM Rotor X 20 06 2007 19 07 2007 17 10 2008 aerodynamics blades computational fluid dynamics discs (structures) elasticity flexible structures rotors vibrations The object of any...

... aircraft engine components and, in some instances, has resulted in the loss of the total engine and aircraft. Estimates put the cost of HCF at over $ 400 million per year ( 1 ). blades discs (structures) turbines numerical analysis 16 09 2003 11 01 2007 25 01...

... disk analyses should incorporate Coriolis effects in order to represent accurately all the significant factors that affect the forced response levels. 13 07 2006 15 08 2006 discs (structures) blades Coriolis force vibrations mechanical stability One of the major problems...

... of contact interfaces including friction contact interfaces, gaps, and cubic nonlinearities. 24 07 2006 25 07 2006 blades discs (structures) vibrations mechanical contact friction The bladed disk assemblies have many contact interfaces such as at blade–disk joints, at contact...

... of the new models and an analysis of the influence of the damper parameters on the forced response of bladed disks is made. 01 10 2005 01 02 2006 blades discs (structures) friction vibration control mechanical contact finite element analysis Due to the high density of natural...

... by application of the modal synthesis method. 25 08 2005 28 09 2005 damping mechanical contact blades discs (structures) finite element analysis friction Bladed disks are subjected to high levels of vibration amplitudes excited under service conditions by aerodynamics...

... accuracy relative to finite element results, even for a case in which the displacement and stress levels show different frequency response trends. 23 02 2005 01 08 2005 blades vibrations discs (structures) turbines engines reduced order systems finite element analysis reliability...

... 2004 01 October 2003 01 March 2004 09 02 2005 vibrations damping finite element analysis discs (structures) nonlinear equations turbines mechanical contact Blade mistuning is inevitable in practical bladed disks and is usually caused by small imperfections...