... Finite element Flow induced vibration Fuels Modeling Periodic Thermoacoustics Unsteady Unsteady flows Vibration Wave propagation Flow induced noise Combustion Can-annular combustors are common in heavy-duty land based gas turbines. In this design, the air flows from the compressor...

... of a chosen design of a gas-turbine structure to variation of the design parameters. In the proposed paper, an efficient method is proposed for a first time for sensitivity analysis of stability for nonlinear periodic forced response vibrations using large-scale models structures with friction, gaps...

...E. P. Petrov An efficient method is proposed for the multiharmonic frequency-domain analysis of the stability for nonlinear periodic forced vibrations in gas turbine engine structures and turbomachines with friction, gaps, and other types of nonlinear contact interfaces. The method allows using...

... of their turbulent kinetic energy λ i . Another ranking is introduced by Sieber et al. [ 6 ] that is based on the cross spectra of mode pairs. This approach is based on the fact that a periodic coherent structure appears as a pair of modes in the decomposition. These pairs are identified by their level...

... FOR G AS T URBINES AND P OWER . Manuscript received June 20, 2016; final manuscript received June 28, 2016; published online September 8, 2016. Editor: David Wisler. 20 06 2016 28 06 2016 Computational fluid dynamics Droplet Film Fluids Modeling Multiphase flows Periodic...

... of tangents to the solution trajectory, and continuation of solutions under parameter variation for structures with bifurcations. The method is aimed at calculation of steady-state periodic solution, and multiharmonic representation of the variation of displacements in time is used. The possibility...

... Frame ,” Finite Elem. Anal. Des. , 41 ( 14 ), pp. 1343 – 1364 . 10.1016/j.finel.2005.03.001 [11] Lee , C. W. , Han , D. J. , Suh , J. H. , and Hong , S. W. , 2007 , “ Modal Analysis of Periodically Time-Varying Linear Rotor Systems ,” J. Sound Vib. , 303 ( 3–5 ), pp. 553...

... with respect to the pilot of 45 deg–90 deg is clearly visible. For the case of a lower pilot fuel split, the situation is more complex because the pilot heat release exhibits two maxima over an oscillation period. This was consistently observed for all test cases with a lower pilot fuel split...

... amplitude is constant in a periodic state, the condition coincides with the flutter boundary. Table 4 Natural frequencies of unswept wing with numerical and measured values Mode Numerical (Hz) Experimental (Hz) % Difference First bending 15.13 15.10 0.2 First torsion 84.73...