VARIABLE SECTION FLOW MIXER FOR DOUBLE TURBOREACTOR FLOW OF SUPERSONIC AIRPLANE

摘要

The invention relates to a variable section flow mixer for a supersonic jet air-jet turbojet, comprising a nozzle (24) intended to be arranged around a turbojet engine gas generator, the nozzle comprising a plurality of openings (30). ) external air intake opening in a convergence zone between cold and hot flows from the gas generator and in which are mounted lobes (32) movable between two positions; a first position in which they obstruct the openings (30) of the nozzle (24) and a second position different from the first in which they release said openings and extend radially in the nozzle (24) so as to allow an admission of external air, the lobes (32) having an azimuthal component in the same direction so as to give a rotational movement to the external air admitted into the convergence zone when the lobes are in the second position.