Air inlet for nacelle of aircraft propulsion assembly for facilitating thrust phase and reverse thrust phase and method of use thereof

The air inlet (1) of a nacelle (2) of an aircraft propulsion assembly (8) comprises an inner wall (11) and an outer wall (12) connected upstream by an air inlet lip (13), the air inlet lip (13) comprising alternately distributed thick and thin portions (17) over the circumference of the air inlet lip (13), each thick portion comprising an upstream leading edge, each thin portion comprising an outer leading edge, each thin portion comprising an outer leading edge, each thin portion comprising an outer leading edge. And a plurality of thin portions (17) for separating an upstream gas flow (F) in the thrust phase into an outer gas flow (F-EXT) guided by the outer wall (12) and an inner gas flow (F-INT) guided by the inner wall (11), each thin portion (17) comprising a downstream leading edge (18) located longitudinally downstream of each upstream leading edge, so as to separate a reverse gas flow (F-INV) at the inlet lip (13) in the thrust reverse phase (B). 飞机推进组件(8)的短舱(2)的进气口(1)包括内壁(11)和外壁(12)，内壁和外壁通过进气口唇部(13)