TWO-CHANNEL SPEAKER Russian patent published in 2018 - IPC F02K9/52 F23D14/22 

FIELD: energy.

SUBSTANCE: invention relates to the field of power engineering and is intended for supplying gaseous fuel and gas components to the combustion chamber of air-breathing engines. Two-channel acoustic nozzle for cutting gaseous fuel comprises a hollow cylindrical body with gas and gas supply nozzles and an end wall with an outlet therein, a back cover and a hollow cylindrical insert with an end wall, concentrically mounted in the cavity of the body, with the formation between the outer surface of the insert and the internal surface of the fuel channel housing, communicating on one side with the fuel supply nozzle, and the other side through a confusion nozzle with a mixing chamber formed between the end walls of the body and the cylindrical insert and communicating with the outlet opening, wherein the cavity of the cylindrical insert is communicating on one side with the gas supply port, and on the other side with the mixing chamber through an adjustable conical nozzle, and in the fuel channel and in the cavity of the cylindrical insert there are acoustic resonators made adjustable. Each of the acoustic resonators consists of at least two pairs of diametrically located profiled plates, one of the plates of each pair being fixed relative to the body and the cylindrical insert, and the other plate of each pair is installed upstream of the fixed plate with the possibility of axial movement along the body and the cylindrical insert, the cylindrical insert is provided with a head with a drive rod on which the internal conical surface of the adjustable conical nozzle is made and its outer conical surface is made in the end wall of the cylindrical insert, the movably mounted plates of the acoustic resonator disposed in the fuel channel are provided with a drive, and the back cover is provided with a central hole in which the drive shaft of the head is disposed.

EFFECT: increase in the amplitude and a change in the frequency of pressure oscillations accelerating the decay of supersonic gas jets, which improves the mixing of gaseous fuel and gas components.

3 cl, 3 dwg