Design and experimental study on turbulence excitation of aeroengine rotor blade system
To study the parametric resonance characteristics of rotor blade systems,a method based on turbulent excitation was proposed.Through proper structure design and layout of the rotor system and turbulent column,and by using the fluid-solid coupling calculation method,the dynamical characteristics of the blade responses under different working conditions were simulated and analyzed,and significant first-order resonance of the rotor blades within the target rotation velocity range was achieved,even without the need of extra excitations.During the experimental verification,the dynamic responses of the rotor blade system can be greatly enlarged by increasing the turbulent excitation pressure.Similarly,slow speed-up rate of the rotor blade system also increased the dynamic responses of the system.Hence via proper turbulent excitation pressure and speed-up rate,the blade dynamical response can be effectively controlled.This work can provide a technical support for the study of dynamical strain,blade tip amplitude,and fatigue characteristics of the resonant rotor blade system at high rotation velocities.
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维普
