Mechanism Research Of Ice Adhesion On Aero-engine Rotating Components

When aircraft flying in icing conditions,some components of aero-engine may confront icing phenomenon.In turbofan engine,ice accretion on fan blade or spinning cone may lead to a decline in the engine aerodynamic performance.More seriously,ice shedding can damage the compressor components,which may cause serious aircraft accidents.The adhesion strength of ice is the main factor,so it is necessary to make a research on material surface adhesion characteristics.This thesis is based on the crack opening displacement theory in the elastic-plastic fracture mechanics,the cohesion zone model and the extended finite element method,combining the experimental measurement and numerical simulation method.On experimental measurement part,adhesion strength tests on aluminum plate,graphene coating aluminum plate,titanium alloy plate,brass plate are conducted.Then dynamic adhesion strength of the titanium alloy plate under a mixed load is measured by using the self-designed rotating device.On numerical simulation part,firstly the ice/titanium alloy micro interface is established and different surface roughness is considered as a parameter on ice adhesion strength.Secondly,micro/nano super hydrophobic structure is established on titanium alloy surface and the different sizes of the structure are considered as a contributing factor.Finally,icing problems of the aircraft engine fan blades and spinning cone are respectively taken into the numerical simulation research.