Numerical Simulation About The Trajectory Of The Shedding Ice In The Aero-engine

Under certain flight conditions, such as under low-temperature, high-altitude and other flight conditions. Because the ambient temperature is too low cloud of supercooled water droplets will be in the aircraft's nose, wings, fuselage, aircraft engine inlet lip, intake cone, rectification support panels will appear frozen in ice accretion phenomenon. When the aircraft and engine's de-icer on or ambient temperature is high, under the influence of aerodynamic and mechanical vibrations. These ice or ice accumulated on the surface of the part borneol will fall off from the surface of the part.They will fly to the downstream. For example, from aircraft engine inlet lip, intake cone, on the surface of the support plate rectification of ice will fall to aviation engine core is likely to hit the blade flew aircraft engines, causing the blade fracture, thus affecting the aero-engine work properly.In order to study shedding ice trajectory to prevent the damage of blades. Two methods of calculation are summarized achievable, One is the use of dynamic CFD meshing algorithm, Another algorithm is to use the steady-state database. Due to the dynamic CFD meshing algorithm for computer hardware requirements, such as high and long computation time Disadvantages. This paper will use the algorithm steady database. Advantage of the steady-state database algorithms mainly in the computing time is short and to the computer's hardware requirements are low.Steady database algorithm consists of four modules. Three input data module respectively, First, the quality and moment of inertia shedding ice modules. Second, gas coning into aviation turbofan engine intake channel flow field data. Third, the aerodynamic forces and moments of shedding ice in the flow field. There is a core module borneol trajectory simulation model, this module implemented by VC ++ programming. For these four modules the aerodynamic forces and moments of the shedding ice are difficulty. Since there is no readily available data, this paper intends to use CFD methods to solve, that is a lot of ice by calculations based on different aerodynamic flow and angle of attack to. Into the database, when calculating get through interpolation.Reached the following conclusions: the aerodynamic forces and moments of the shedding ice are direct ratio to dynamic pressure, and to flow with the angle of attack. Finally got under different initial conditions borneol flight path.