MODIFIED SOUND SECONDARY NOZZLE Russian patent published in 2022 - IPC F02K1/48 F02K3/06 

FIELD: engine building.

SUBSTANCE: invention relates to an assembly of a rear part of gas turbine engine (10) containing primary nozzle (11) containing a rear edge and forming a flow path section of the first circuit, and secondary nozzle (110) forming a flow path section of the second circuit around longitudinal axis (X), while the specified secondary nozzle is made with the possibility of emitting a mixture of flows coming out of flow path (Vs) of the second circuit and from flow path (Vp) of the first circuit of gas turbine engine (10), while the secondary nozzle has a tapering-expanding shape with critical section (112) corresponding to the minimum section of nozzle (110), while secondary nozzle (110) contains at the level of critical section (112) a periodic sequence of petals (116, 118) located along the inner circumference of secondary nozzle (110). The assembly also contains petal mixer (130) at an output end of primary nozzle (11), containing an alternation of hot petals (134) passing inside the flow path of the second circuit and cold petals (132) passing inside the flow path of the first circuit. Concave, that is, radially outward-directed, petals (118), respectively convex, that is, radially inward-directed, petals (116) of nozzle (110) are located, without taking into account longitudinal displacement, radially opposite hot petals (134), respectively, cold petals (132) of mixer (130).

EFFECT: noise reduction is achieved.

10 cl, 6 dwg