Numerical Analysis Of Fluid-structure Interaction On Rotor Blade Of Counter-rotating Turbine

Counter-rotating turbine technology can have great advantages on improving the thrust-weight ratio, specific fuel consumption and the overall performance of an aeroengine, but it also brings a lot of pressing problems. There is stronger airflow on the low-pressure rotor blades of the vaneless counter-rotating turbine than the conventional. And the analysis has a great significances on the understanding of structural strength and vibration characteristics of the counter-rotating turbine blade due to wake action.In this paper, linear interpolation theory, and the weighted average method are used to compile Load into interpolation procedure. The result of Liquid Computing will be applied to the fluid loading on finite element model. Meanwhile, the strength analysis of a turbine blade is compared with the result of Workbench/CFX. Finally, the two results showed high levels of matching. The ANSYS/CFX software is used to analyze the transient fluid-structure interaction for a certain type of low-pressure turbine rotor blades based on describing process of transient fluid-structure interaction. The effects of different temperatures and axial spacing on structural strength of blade are analyzed. Transient results are managed with spectrum analysis method in order to investigate the effects of different temperatures and axial spacing on vibration characteristics.The conclusions may have some references to the structural strength and vibration analysis of the counter-rotating turbine rotor blades.