NOZZLE WITH MASS FLOW AND FORWARD FLOW Russian patent published in 2022 - IPC F02K9/97 

FIELD: engine building.

SUBSTANCE: invention relates to engine building, in particular to the method for operation and the device of nozzles with the expiration of masses for various engines. The device is a nozzle, which is conditionally divided into two parts (determining its geometric shape): conical part 1, with a wall inclination angle of 45°, turning into a cylindrical part 2. Inside the nozzle, along its entire length, there are spiral grooves 3, at the nozzle inlet, having an angle of inclination from 95 to 130° with respect to the axis of the nozzle (above the axis), while the angle of inclination of the grooves 3 is constant along the entire length of the nozzle. The number of helical grooves 3 is a multiple of two; the number and volume of the grooves 3 may increase as the nozzle inlet diameter increases. Spiral grooves 3 from the conical part 1 pass into the cylindrical part 2 of the nozzle, while the grooves 3, in the cylindrical part 2, at the outlet of the nozzle, have an inclination of 0° relative to the axis of the nozzle. The number of grooves 3 in the cylindrical 2 part of the nozzle must be a multiple of four.

EFFECT: invention provides an increase in traction and a decrease in noise.

1 cl, 5 dwg