Study on the cleaning mechanism of the fouling of the compressor blade

As the heart of aero-craft, aero-engine's performance is the most influent factors of flight safety and fuel consumption rate. When Aircraft engine works in flight, the pollutants in the air will adhere to the surface of the compressor accumulated fouling, which increases boundary layer thickness and surface roughness of gas path components wall, and seriously affects the aerodynamic performance of the engine. In this paper, the cleaning mechanism of compressor blade are analyzed in theory. Firstly, the movement characteristics of the droplet impact compressor wall are studied, and the influence of different slope angles on the splash condition is analyzed; Secondly, the shear stress — positive stress model of droplet and fouling interaction is studied. Through theoretical analysis, the optimal jet model of scale removal is obtained, which provides theoretical support for aircraft engine on-line washing.