Study On Prediction Method Of Sand And Dust Erosion Damage Location Of Compressor Blade

When the aircraft is working in the sand-dust zone,it will inhale a large amount of sand.When the sand enters the core machine,it will cause permanent wear to the blade,change the overall performance of the engine,cause great damage to the engine,solid particles to the compressor,static and Erosion of the rotor blades can cause permanent wear,pitting and leading edge damage,increasing the surface roughness of the blade and the total pressure loss of the blade passage.(1)The force analysis of the sand dust in the flow field was carried out,and the flow field database and the collision bounce database were established.By analyzing the effect of flow field on sand dust and obtaining the force during sand dust movement based on particle orbit model,the parameters of flow field parameters of the model flow were obtained by using Numeca flow field calculation software;The collision rebound test of particle size sand dust with titanium alloy plate under different incident conditions,the rebound parameters of sand dust under different incident conditions were obtained.The flow field database and collision bounce database were established with VC++ as the research platform.(2)Based on the particle orbit model and Lagrangian method,the calculation program of sand dust trajectory is programmed,and the flight path of single sand dust in the compressor flow channel and the collision position with the blade are calculated.(3)The numerical calculation of a large number of sand dust flight trajectories was carried out,and the general law of sand dust surface collision parameters on the rotor blade surface was obtained.The flight path and collision parameters of a large number of sand dusts are obtained through continuous cyclic calculation in the program.The numerical results show that the rotor blades are subjected to higher sand and dust collision frequency than the guide vanes and stator blades;the sand dust collides with the blades.The leading edge and the basin position,the height of the leaf increases with height,the collision frequency increases continuously,and the collision frequency near the tip is higher.The data of the collision parameters were fitted by Matlab software,and the fitting equations of different leaf heights and blade surfaces were obtained.The fitting equations based on different leaf heights were smaller than the surface fitting fitting error,and the fitting was more accurate.Through the research in this paper,the distribution of sand and dust on the surface of the compressor blade can provide a theoretical basis for improving the strength of the corresponding part of the compressor blade,and provide reference for the anti-erosion design of the compressor.Reduce the damage of sand dust to the erosion part of the blade after entering the compressor,so as to improve the service life,safety and reliability of the compressor.Through the research in this paper,the distribution of sand and dust on the surface of the compressor blade can provide a theoretical basis for the antierosion design of the compressor.