... unsteady techniques as a transient regime must be bypassed. New techniques, dedicated to time-periodic flows and based on Fourier analysis, have been developed recently. Among these, harmonic balance methods cast a time-periodic flow computation in several coupled steady flow computations. A time-domain...

... was also modeled for reference comparisons. Computed unsteady forces of the first stage rotor blades showed cyclic change both in magnitude and direction while moving around the circumference. Unsteady forces of first stage rotor blades were plotted in the frequency domain using Fourier analysis...

... be captured by the present Fourier solution with even one harmonic. 14 07 2009 04 08 2009 25 10 2010 25 10 2010 cavitation discs (structures) flow instability Fourier analysis heat transfer rotors vortices The overall efficiency of gas turbines is strongly dependent...

.... Review Chair: R. Natole. 04 June 2001 01 February 2001 gas turbines rotational flow flow simulation finite element analysis fluid dynamics Fourier analysis vibrations resonance High cycle fatigue of rotating turbine components is a serious problem, causing substantial...

... instability wavelet transforms low-pass filters band-pass filters Fourier analysis Increasing the overall efficiency while improving engine handling is a desired but a very challenging task for any control unit since safe operation of the engine has to be guaranteed for all flight and engine...