Self-cleaning pipeline of aero-engine

An aero-engine self-cleaning pipeline belongs to the technical field of aero-engine pipelines, and comprises circular section pipelines, a circular-to-flat-square pipeline transition section, a flat-square pipeline and an annular cleaning section, the circular section pipelines are arranged at two ends of the flat-square pipeline, the circular section pipelines are connected with the flat-square pipeline through the circular-to-flat-square pipeline transition section, and the annular cleaning section is arranged on the flat-square pipeline. An inlet at one end of the annular cleaning section is inserted into the flat-square pipeline to be communicated with the flat-square pipeline, and an outlet at the other end of the annular cleaning section is inserted into the other side of the flat-square pipeline to be communicated with the flat-square pipeline. According to simulation verification, the filtering efficiency can be improved by 80% or above, the medium pressure is reduced by 30% or above, the problems tha