JET NOZZLE WITH CENTRAL BODY Russian patent published in 2023 - IPC F02K1/06 

FIELD: aircraft engineering.

SUBSTANCE: jet nozzle with a central body, connected to the engine and containing an output device with a central body, a flow part and an outlet section other than axisymmetric, contains a propulsion part fixed on the engine, with a concentric flow part limited by at least one body, and the propulsion part contains a power belt attachment to the aircraft. The output device contains at least two outer bodies and is made with the possibility of being fixed on the aircraft by at least two fastening means and with the possibility of being connected to the propulsion part by means of a sealed elastic element. The flow part of the outlet device is made cylindrical on the side of the sealed elastic element. The sealed elastic element is made in the form of a bellows. The output device is made with a horizontal central body. The output device is made of three bodies and assembled by means of flange connections. The body of the output device, first along the flow of the working fluid, is provided with a means of fastening to the aircraft in the form of a power belt, and the second means of fastening to the aircraft is made in the form of outwardly developed connecting flanges of the second and third bodies. The propulsion part contains a drain head fixed to the engine inside it.

EFFECT: reduction in operational loads on the connection node of the propulsion part of the jet nozzle with the outlet device and the exclusion of the possibility of flow leaks from the flow part, as well as the reduction of the flow resistance of the flow part by increasing the rigidity of the elements that form it, that is, by reducing their deformation during operation, which leads to a decrease in flow losses in the channels of the flow part and an increase in the reliability of operation and the efficiency of the unit as a whole.

6 cl, 1 dwg