Air inlet of an aircraft nacelle including optimized frost treatment

An air intake of an aircraft nacelle, comprising:

• a pipe that extends over the circumference of said air intake and that is bordered to the rear by a front frame (20);
• and
• means (24) for localized injection of hot air in said pipe (22) that provides circulation of hot air in the pipe along a circumference of the nacelle in one direction,
• wherein, in the pipe (22), there is provided a vortex generator (38) that disrupts a flow of hot air that flows along the length of the pipe so as to compensate for an action of centrifugal force and reduce a temperature gradient between an inner side and an outer side of said pipe (22),
• the vortex generator (38) comprising a surface, said surface having a first side in connection with and running along a surface of the pipe, and a second side defined by a first end connected to an upstream end of the first side and a second end distanced from the surface of the pipe and positioned downstream from the first end.